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  • Atenolol

    Atenolol is used off label and given by mouth to treat certain heart conditions in dogs, cats, and ferrets. Common side effects include tiredness and stomach upset. Contraindications include hypersensitivity to beta-blockers, heart failure, heart block, low heart rate, or certain lung disease. If a negative reaction occurs, please call your veterinary office.

  • Atlantoaxial Luxation

    This handout summarizes atlantoaxial (AA) luxation, a condition in which instability or excessive movement is present between the first two vertebrae within the neck. This instability causes pressure on the spinal cord. Atlantoaxial luxation can be caused by trauma, hereditary factors, or a combination of both.

  • Atopic Dermatitis (Atopy) in Cats

    This handout discusses atopic dermatitis (atopy), a form of allergic skin disease brought on by an abnormal response to allergens in the environment. The clinical signs, diagnosis, and treatment are outlined.

  • Atopic Dermatitis (Atopy) in Dogs

    This handout explains atopic dermatitis (atopy) in dogs, a form of allergic skin disease brought on by an abnormal response to allergens in the environment. The clinical signs, diagnosis, and treatment are outlined.

  • Atopivet: Topical

    Atopivet® topical products are formulated to help maintain a healthy skin barrier and support skin health in cats and dogs. These skin care products are available over-the-counter in the forms of a mousse, spot-on, and skin-care collar.

  • Atovaquone

    Atovaquone is given by mouth and is used off-label to treat protozoal infections. Give as directed. Side effects are uncommon but may include stomach upset or skin rash. Do not use in pets that are pregnant. If a negative reaction occurs, contact your veterinarian as soon as possible.

  • Atrial Fibrillation in Cats

    Atrial fibrillation describes rapid contractions or twitching of the heart muscle, specifically in the atria. In cats, atrial fibrillation occurs secondary to heart disease. The signs that are observed are often related to that underlying condition, and may include exercise intolerance, cough, or difficulty breathing. Signs, treatment, and outlook are discussed.

  • Atrial Fibrillation in Dogs

    Atrial fibrillation describes rapid contractions or twitching of the heart muscle, specifically in the atria. In dogs, atrial fibrillation usually occurs secondary to heart disease. In some large breed dogs, atrial fibrillation occurs as a primary heart problem. Signs, treatment, and outlook are discussed.

  • Atrioventricular Valve Dysplasia in Cats

    Atrioventricular (AV) valve dysplasia is a developmental malformation of the mitral or tricuspid valve in the heart. Signs include exercise intolerance, accumulation of fluid in the abdomen, weight loss, and stunted growth. Difficulty breathing or collapse may occur if congestive heart failure develops. Treatment of AV valve dysplasia is focused on managing signs of congestive heart failure and/or disturbances in heart rhythm, generally using medications.

  • Atrioventricular Valve Dysplasia in Dogs

    Atrioventricular (AV) valve dysplasia is a developmental malformation of the mitral or tricuspid valve in the heart. Signs include exercise intolerance, accumulation of fluid in the abdomen, weight loss, and stunted growth. Difficulty breathing or collapse may occur if congestive heart failure develops. Treatment of AV valve dysplasia is focused on managing signs of congestive heart failure and/or disturbances in heart rhythm, generally using medications.