Although certain types of insulin may be interchangeable in humans, they don't necessarily behave the same way in pets, warns veterinarian Lee Pickett, who writes that pet owners should stick with the insulin their veterinarian has prescribed for a pet with diabetes rather than accepting a switch initiated by a pharmacist. Dr. Pickett also answers an owner's question regarding foxglove plant toxicity in cats. Foxglove plants are the origin for the cardiac medication digitalis and could cause problems, including life-threatening cardiac issues, if ingested by an animal, she writes.

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