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  • Primary liver tumors in dogs and cats are rare. There are 4 types: hepatocellular tumors, bile duct tumors, neuroendocrine tumors, and sarcomas. These cancers can be massive, nodular, or diffuse in form. In dogs, most liver tumors are malignant, while in cats, most are benign. The signs of liver tumors range from being asymptomatic to having inappetence, fever, lethargy, and weight loss; and less commonly, nausea, vomiting and diarrhea; increased drinking and urination; and jaundice. Occasionally there are neurological signs, such as seizures. With tumor rupture and intrabdominal bleeding there may be weakness, collapse, and difficulty breathing. The diagnosis is based on history, clinical signs, exam findings, diagnostic imaging, and FNA or liver biopsy. A biopsy is best for a definitive diagnosis. Surgery is the treatment of choice for most primary liver tumors followed by chemotherapy. Chemoembolization is a newer treatment.

  • Cats can have hearing loss due to increasing age or chronic ear infections, or they may be born with a defect. Deafness in cats can present some challenges, but overall they can have healthy, normal lives. It is possible to teach your cat household routines by using hand signals and body language. It is important to take their deafness into account when considering their safety, and they must remain indoors or in outdoor enclosures.

  • Lomustine is given by mouth and is used off label to treat certain cancers such as mast cell tumors and brain tumors. Give this medication as directed by your veterinarian. Common side effects include vomiting, diarrhea, lack of appetite, and hair loss. Do not use in pets that are severely allergic to it. If a negative reaction occurs, please call your veterinary office.

  • Loperamide is given by mouth and is used off label to treat signs of diarrhea. Give as directed by your veterinarian. Common side effects include constipation, bloat, and sleepiness. Do not use in pets that are allergic to it, that have diarrhea due to an infection or a toxin, or that are positive for the MDR1 gene. If a negative reaction occurs, please call your veterinary office.

  • Lorazepam (brand names Ativan®, Lorazepam Intensol®) is a benzodiazepine medication used off label to treat behavior problems such as anxiety, fears, and phobias in cats and dogs. It can also be used to treat seizures or to stimulate appetite in cats. It is given by mouth or injection. Do not use in pets that are allergic to it or other benzodiazepines, or that have severe breathing problems, or liver disease. If a negative reaction occurs, please call your veterinary office.

  • Grief is the normal and natural response to the loss of someone or something. It is a full body experience that includes physical, emotional, cognitive, social, and spiritual responses. The best way to manage your grief is to be reassured that these reactions are normal and to let them run their natural course. Grieving takes time. Usually it gradually lessens in intensity over time, but if it doesn’t, then professional counseling may help.

  • Lotilaner is used to treat and prevent flea infestations and treat and control tick infestations in dogs and cats. After being administered to a pet, lotilaner is distributed throughout the body. When fleas or ticks bite the dog or cat, they are exposed to the drug and killed during their blood meal.

  • Low molecular weight heparin is given by injection under the skin and is used off label to treat abnormal blood clots. Give as directed. Side effects may include pain at the injection site. Do not use in pets that are allergic to any type of heparin or pork products. If a negative reaction occurs, call the veterinary office.

  • Lufenuron is a medication that controls flea infestations in dogs, cats, rabbits, and ferrets. It is given by mouth in the form of a tablet or liquid to dogs, cats, rabbits, and ferrets. It may also be given by injection to cats. Side effects are uncommon but may include vomiting, diarrhea, lack of appetite, tiredness, reddening of the skin, or itchiness. Do not use in pets that are allergic to it. If a negative reaction occurs, please call your veterinary office.

  • Lung flukes in North America are parasites called Paragonimus kellicotti that infect the lungs of cats after they have eaten an infected crayfish or rodents that have eaten infected crayfish. Eggs are then released by the parasite into the cat’s sputum to be coughed out or swallowed and released in the feces to continue the life cycle. Lung flukes can be found anywhere in North America but more commonly around the Mississippi River and Great Lakes. Infected cats can be symptom-free or may develop cough with sometimes bloody mucus, pneumonia, pneumothorax, lethargy and weakness. Diagnosis can include locating eggs of the parasite from feces or mucus from the lungs. X-rays can also reveal cysts in the lungs caused by the parasite. Treatment requires one of 2 commonly used anti-parasitic medications: Praziquantel or Fenbendazole. Although zoonotic, these parasites won’t transmit directly from cats to humans.