Asparagus fern (also called emerald feather, emerald fern, sprengeri fern, plumosa fern, and lace fern) is toxic to dogs and cats. The toxic agent in this plant is sapogenin—a steroid found in a variety of plants. If a dog or cat ingests the berries of this plant, vomiting, diarrhea, and/or abdominal pain can occur. Allergic dermatitis (skin inflammation) can occur if an animal is repeatedly exposed to this plant.

Fleas are blood-feeding parasites that can infest many species of birds and mammals. Although fleas on dogs and cats don’t infest people, fleas may bite people if an area is heavily infested. Flea infestation is one of the most common medical problems veterinarians see, and pets suffer greatly from this condition. Flea bites can trigger severe allergic reactions in some pets. The intense itching caused by flea infestation causes pets to scratch and bite themselves. This can lead to skin wounds, skin infections, and general misery for your pet. Even if your pet is not allergic to flea bites, fleas can transmit serious diseases, such as bartonellosis (the bacteria that causes “cat scratch disease” in people), and other parasites, like tapeworms.

The most common and serious behavior problems of dogs are associated with aggression. Canine aggression includes any behavior associated with a threat or attack (e.g., growling, biting).

Alopecia is the medical term used to describe hair loss. Alopecia can occur when hair fails to grow at a normal rate, or when hair is lost more quickly than it can grow back. Alopecia should not be confused with increased shedding. Shedding (even year-round shedding in some pets) is a normal process and is not an illness. Shedding should only be a cause for concern if it is heavy enough to create areas of thinning hair or baldness consistent with alopecia.

Some animals may have several of these clinical signs, whereas others may have only one—perhaps an ear infection.

Bladder and kidney stones are hardened accumulations of minerals found in urine. Common minerals involved include struvite, calcium oxalate, and urate. Dogs and cats can develop stones anywhere in the urinary tract. Stones can form in many different shapes and sizes.

Obesity (the storage of excess fat) is usually caused by excessive food intake and insufficient exercise. According to estimates, 40% to 50% of dogs are overweight and 25% of dogs are obese. Obesity is more common in older, less active pets. Dogs that are fed homemade meals, table scraps, and snacks are more likely to be overweight than dogs that are fed only a commercial pet food.

Companion animals today have the opportunity to live longer, healthier lives than ever before. One of the main reasons for this is the availability of vaccines that can protect pets from deadly viral and bacterial diseases. Over the past several decades, the widespread use of vaccines against canine distemper, parvovirus infection, rabies, and other diseases have saved the lives of millions of dogs and driven some of these diseases into relative obscurity. Unfortunately, these diseases still pose a significant threat to dogs that are unvaccinated; so, although vaccine programs have been highly successful, pet owners and veterinarians cannot afford to become complacent about the importance of keeping pets up-to-date on their vaccinations.

Ear infections are usually secondary to inflammation of the external ear canals (the tube-shaped part of the ear visible under the ear flap). Inflammation of the canals leads to the reproduction of normal bacteria and yeast that live in the ear to the point where the body is unable to control their numbers (called overgrowth).  Other bacteria can also take advantage of the inflammation and unhealthy environment inside the ear to establish infection. The overgrowth of these organisms causes more inflammation. Inflammation of the ear canal causes swelling, making the tube narrower than usual. Inflammation also causes an increase in the production of wax. The ears become very itchy and painful. Severe ear infections can lead to eardrum rupture and middle and inner ear infections. Deep infections can lead to deafness and neurologic signs.

Colitis is the inflammation of the colon, which is the last portion of the digestive tract. Under normal conditions, the colon stores feces while absorbing fluid and nutrients. When the colon is inflamed, these functions are affected. Additional fluid is left in the colon, resulting in diarrhea.

Your home can hold a lot of unrecognized dangers for your pet. Many common food items or household products can sicken or even kill animals. However, a few simple precautions can help keep your pet safe.

Constipation is a condition in which cats pass feces less often or in smaller amounts than normal. Feces are often hard and dry, which may cause cats to strain or have difficulty passing feces. While constipation may occur periodically, obstipation is a more persistent and severe form of constipation, in which defecation is impossible or nearly impossible.

Grief is a natural reaction to the loss of a pet. Regardless of whether the pet is old or young, or whether the loss is expected or sudden, family members and other people who were close to the pet will experience similar feelings when a beloved pet dies. These feelings, commonly called the five stages of grief, are the same as those experienced when a person passes away.

Many veterinarians recommend crate training as a good way to housebreak puppies, and in some cases, adult dogs. This training method is based on the principle that dogs prefer not to soil where they sleep. A comfortable crate not only provides a puppy with a secure, den-like atmosphere but also prevents destructive behaviors (such as chewing inappropriate items) and protects against household dangers (such as electrical wires) when a puppy isn’t being supervised.

Demodectic mange is an inflammatory skin condition caused by microscopic mites of the genus Demodex. These mites are transmitted from mother dogs and cats to their puppies or kittens during nursing and become normal inhabitants of the hair follicles. In small numbers, the mites usually don’t cause problems. However, in animals with certain genetic factors, metabolic disease, or a compromised immune system, the number of mites can increase, causing skin inflammation.

Bad breath in pets may be a sign of periodontal disease that could lead to other health problems. Periodontal disease starts when plaque (a bacterial film) coats the tooth. Plaque hardens (calcifies) into tartar, a thick yellow or brown layer on the teeth. Tartar can irritate the gums, creating an environment where bacteria thrive. As the disease progresses, the gums become tender, red, and swollen and the bacteria continue to multiply. Eventually, the inflamed gums pull away from the teeth, creating pockets that trap more bacteria and food particles. The gums bleed, the roots of the teeth may become exposed, teeth may become loose, and your pet may feel pain when eating. If the bacteria enter the bloodstream, they can create problems for organs such as the heart, lungs, liver, and kidneys.

It’s estimated that 85% of all pets have periodontal disease by the time they are 3 years of age. Periodontal disease is a progressive disease of the supporting tissues surrounding teeth and the main cause of early tooth loss.

The term dental disease in dogs and cats is very broadly used to describe gingivitis (inflammation of the gums) and periodontitis (inflammation of the bone and other support structures around the tooth). Another term commonly used to collectively describe these two conditions is periodontal disease.

A pet with diarrhea has looser or more watery feces than normal and sometimes more frequent stools as well.

Ear cleaning can help treat or prevent ear problems. Some pets are prone to ear problems and may need regular ear cleanings between veterinary visits. Ear cleaning can help remove dirt and wax that can prevent medications from reaching inflamed areas. It can also get rid of allergens and microbes that may contribute to inflammation or infection.

An ear hematoma is a pocket of blood that forms within the exterior portion of a pet’s ear. Although both dogs and cats can have ear hematomas, the condition is more common in dogs.

Ear infections generally begin as inflammation of the skin inside the outer ear canal. Once the inflammation is present, discharge, redness, and other characteristics of an ear infection become established.

Cats are notorious for preferring sleep to exercise. However, regular exercise is important to your cat’s health because it burns calories, reduces appetite, maintains muscle tone, and increases metabolism (the rate at which calories are burned).

Obesity (the storage of excess fat) is usually caused by excessive food intake and insufficient exercise. One of the biggest problems in cats is overfeeding, which can lead to serious problems, including obesity, heart disease, and arthritis, resulting in a shortened life span. Your veterinarian can recommend a proper type and amount of food to maintain your cat’s ideal weight.

The pancreas is an organ in the abdomen that is involved in helping the body digest food. The pancreas releases enzymes (proteins that are involved in chemical reactions in the body) into the digestive tract to help break down fats and promote digestion. When the pancreas becomes inflamed, the condition is referred to as pancreatitis. 

With many cats living well into their teens or even twenties, many owners wonder: When is a cat truly a senior citizen? The answer is that there is no specific age at which a cat becomes “senior.” Individual pets age at different rates.

Here’s how your cat’s urinary system works. The kidneys filter waste and toxins from the blood. These waste products then become part of the urine in the kidneys. Urine leaves the kidneys through narrow tubes called ureters, which empty into the bladder. When your cat urinates, the bladder is emptied through a tube called the urethra. Feline urinary problems are usually grouped into conditions of the lower urinary tract (the bladder and urethra) and the upper urinary tract (the kidneys and ureters).

Companion animals today have the opportunity to live longer, healthier lives than ever before. One of the main reasons for this is the availability of vaccines that can protect pets from deadly infectious diseases. Over the past several decades, the widespread use of vaccines against diseases like panleukopenia and rabies has saved the lives of millions of cats. Unfortunately, infectious diseases still pose a significant threat to cats that are unvaccinated; so, although vaccine programs have been highly successful, pet owners and veterinarians cannot afford to become complacent about the importance of keeping pets up-to-date on their vaccinations.

Dealing with an injured pet can be scary and frustrating. In many cases, you don’t know how bad the injury is, and your pet may not be acting normally. If your pet is injured, the first thing you need to do is try to remain calm. If possible, try to determine how severe the injury is, but remember that caution is extremely important when approaching an injured animal. Any pet, no matter how calm or friendly he or she may usually be, can bite or scratch when in pain.

Flea allergy dermatitis (FAD) is a severe allergic reaction to a flea bite. Both dogs and cats can develop FAD. Affected pets have an extreme allergic reaction to certain proteins in the flea’s saliva, which the flea injects into the pet’s skin during biting and feeding. Some pets are so allergic that even a single bite can cause a reaction.

Fleas and ticks are external parasites that can cause extreme discomfort for your pet and can also cause serious diseases.

Food allergy (also called food hypersensitivity) refers to a type of physical reaction to food. Food reactions are classified into two categories: those that are the result of immune system stimulation and those that are not. Food allergy occurs when the immune system begins to overreact to ingredients that the pet has eaten with no problems in the past. Food intolerance occurs when what is eaten has a direct, negative effect on the stomach and/or intestines, such as spoiled meat, chewed up toys, food additives, and abrupt changes in diet. Food intolerance is not an immune reaction.

Heartworm disease is a serious and potentially fatal condition that affects dogs, cats, and up to 30 other species of animals. It is caused by parasitic worms (heartworms) living in the major blood vessels of the lungs and, occasionally, in the heart. These worms are transmitted (as microscopic larvae) through the bite of an infected mosquito. The scientific name for the heartworm parasite is Dirofilaria immitis.

Heartworm disease is a serious and potentially fatal condition that affects dogs, cats, and up to 30 other species of animals. It is caused by parasitic worms (heartworms) living in the major blood vessels of the lungs and, occasionally, in the heart. These worms are transmitted (as microscopic larvae) through the bite of an infected mosquito. The scientific name for the heartworm parasite is Dirofilaria immitis.

The word stroke comes from “strike,” and heatstroke means “to be struck down by heat.” Heatstroke is a life-threatening condition suffered when a pet is unable to lower its body temperature. Cells in the body become damaged when the core body temperature is between 106°F and 109°F.

Itching can make pets absolutely miserable, but it is actually a sign of an underlying problem.

Despite the adage about a dog’s nose being warm, cold, wet, or dry, any of those signs may, in fact, be normal. Many other signs can give you a better indication of illness in a dog. For example, any changes such as decreases in energy level (e.g., sleeping more), decreased appetite, or weight gain/loss may signal that your dog is not feeling well.

A number of human foods are dangerous to pets. Many of these foods may seem tasty to our pets but can prove deadly if eaten. It can be very tempting to offer pets food from the table, but pets should not be given human food unless recommended by your veterinarian.

Socialization is the learning process through which a kitten becomes accustomed to being near various people, animals, and environments. By exposing kittens to different stimuli in a positive or neutral way, before they can develop a fear of these things, owners can reduce the likelihood of behavior problems in the future and help build a stronger bond between pets and the rest of the family. The critical time to socialize a kitten is during the first 3 to 4 months of its life.

A lipoma is a benign (noncancerous) mass that is made of fat cells. Owners often notice these lumps on the chest, abdomen, and limbs of their pets, but lipomas can also occur inside the chest and abdomen.

Malassezia dermatitis (MD) is a yeast infection of the skin caused by the organism Malassezia pachydermatis. Malassezia pachydermatis is a yeast organism that normally lives in small numbers in the ears and on the skin. The infection occurs when this organism grows in large numbers. In its most severe form, the infection can cause a thickening of the skin (lichenification), making it resemble an elephant’s skin (hence the name pachydermatis).

Neutering, also known as castration, is a surgical procedure that involves removal of the testicles. It is a common surgical procedure performed on male dogs and cats to eliminate the ability to impregnate females. Neutering is also used to treat certain medical conditions, such as testicular cancer, anal tumors, and some forms of prostate disease.

Currently, studies estimate that approximately half of the pets in the United States are either overweight or obese. The health consequences of obesity in pets include increased risk for joint disease, heart and respiratory problems, and diabetes. Some researchers also have redefined obesity as a chronic inflammatory condition that can have other harmful effects in the body. Being overweight is not cute and it is not just a nuisance; it is now being recognized as a medical problem that should be managed long-term to reduce associated health risks.

Pets with pica or coprophagy eat substances that are not considered food. Pica involves the eating of objects. Dogs may be more likely to eat objects such as rocks and toys, while cats may eat clothing, strings, and kitty litter. Oriental breeds of cats are more likely to eat fabrics and wool.

Heartworm disease is serious and potentially fatal. It affects dogs, cats, and up to 30 other species of mammals. Heartworm disease has been reported in all 50 states. It is caused by parasitic worms (heartworms) living in the major vessels of the lungs and, occasionally, in the heart. Heartworms are transmitted (as microscopic larvae) through the bite of an infected mosquito. The scientific name for the heartworm parasite is Dirofilaria immitis.

Pyoderma is a bacterial infection of the skin. It can occur when the skin’s natural defenses break down, allowing common skin bacteria to multiply out of control (called overgrowth). Bacteria from another source may also take hold when given the opportunity. Other organisms, such as yeast and fungal organisms, can take advantage of the skin changes that occur with pyoderma and establish their own infections. Dogs and cats of any age can be affected by pyoderma.

Seborrhea is a general term used to describe skin and hair that has excessive amounts of flakes (like dandruff) and/or grease. In most cases, the term describes the clinical signs, and not a disease itself.

Separation anxiety is a behavior problem in which a dog panics after (and sometimes before) being left alone. Dogs with this problem may vocalize, pace, urinate, defecate, and/or engage in destructive behavior before and/or after their owner leaves. Escape attempts by affected dogs can result in self-injury and household destruction, especially around windows and doors.

A spay, also known as an ovariohysterectomy (ovario – hyster – ectomy) is one of the most common surgical procedures performed on female dogs and cats. This surgery removes the entire uterus and both ovaries. The primary reason for performing a spay is to prevent unwanted pregnancy. However, the procedure has other uses, including treatment for uterine cancer and uterine infection.

Spaying and neutering are surgical procedures used to remove the reproductive organs of dogs and cats. Spaying is the removal of the uterus and ovaries of a female dog or cat. Neutering is the removal of a male dog’s or cat’s testicles. These procedures are also sometimes referred to as “sterilizing” or “fixing” pets.

A wellness examination is a complete physical examination along with diagnostic testingthat may include bloodwork, urinalysis, and checking a stool sample for parasites. In many cases, a wellness examination can help detect the early stages of disease. Often, your veterinarian will schedule this exam when your pet is due for vaccinations.

Obviously, if a dog will be working as a search and rescue dog or service assistance dog, proper training is extremely important. But what if you’re just looking for a dog to share your life and be a couch potato with you? In truth, even companion dogs, large and small breeds alike, need training to learn proper behavior among people and other dogs.

Nail trimming should be calm and stress-free for you and your cat. Teaching your cat to accept having his or her feet touched can help make nail trimming easier. Ideally, cats should be introduced to nail trimming when they are kittens. Most cats require nail trimming every 10 days to 2 weeks. Contact your veterinarian if you are unsure of how to cut your cat’s nails or if you experience difficulties. 

The urinary tract consists of four parts:

1. Two kidneys, which produce urine
2. The ureters, tubes that transport urine from the kidneys to the bladder
3. The urinary bladder, where urine is stored
4. The urethra, which carries urine from the bladder to the outside

Any part of the urinary tract can be affected by disease.

Kidney failure: Acute kidney failure is the sudden loss of kidney function, which may be caused by a number of factors, including decreased blood pressure, toxins such as antifreeze, ureteral or urethral obstructions, and diseases, such as leptospirosis and Lyme disease. If diagnosed early and treated aggressively, acute renal failure may be reversible. Chronic kidney failure is long-term loss of kidney function that cannot be reversed, but treatment may help slow the progression of the disease.

Vomiting is defined as the forceful emptying of the stomach’s contents. It is caused by a signal from the brain to the stomach that originates in a part of the brain known as the vomiting center. Vomiting initially developed because it helps save animals from poisoning. Nerves in the abdomen or certain substances in the bloodstream indicate to the brain that the animal may have eaten something toxic, and vomiting can help to rid the body of the toxic substance. Although this does occur now, the actual ingestion of toxins has become less of a threat to our pets than to their wild ancestors; over time, many more triggers began to induce the brain to signal vomiting. Prolonged vomiting can be dangerous because it can lead to life-threatening dehydration.

Companion animals today have the opportunity to live longer, healthier lives than ever before, in part due to the availability of vaccines that can protect pets from deadly infectious diseases. Over the past several decades, the widespread use of vaccines against diseases like rabies has saved the lives of millions of pets and driven some diseases into relative obscurity. Unfortunately, infectious diseases still pose a significant threat to dogs and cats that are unvaccinated; therefore, although vaccine programs have been highly successful, pet owners and veterinarians cannot afford to be complacent about the importance of keeping pets up-to-date on their vaccinations.

Xylitol is a sugar substitute that is commonly used in sugar-free gum and candy, nicotine gum, toothpaste, baked goods, and chewable vitamins. Xylitol has been used safely in these human products for many years, but it is toxic (poisonous) when eaten by dogs. Xylitol toxicosis occurs when a dog eats enough of the product to cause damaging effects in the body. Currently, xylitol is not known to be toxic in cats. Other artificial sweeteners, such as aspartame, are not known to be toxic in pets.