What are some possible causes of weight loss in cats?

If your cat is shedding pounds – not just fur – it's important to get him checked out by a veterinarian. Although stress is one of the most common causes of weight loss in cats, there are also a host of medical conditions that could be to blame.

Parasites, heartworm, cancer, feline leukemia virus, giardia, and kidney disease are only some of the potential reasons for weight loss in cats. With so many possible causes, there's no sense guessing what's wrong – you need an official diagnosis from a veterinarian. So take note of other symptoms – is your cat eating? Does he have diarrhea? How has his behavior changed? Observe your cat carefully and then take him in for a thorough exam.

– Dr. Andrea Looney, DVM for the “Purina® Animal Instincts” Podcast Series

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