This may be an injury to its tail or it could be a problem with its anal glands worms or a skin allergy. His fat and seemingly agile tail is the perfect target practice for his hunting skills. Why Does My Cat Suck On Blankets Cats Suck Cat Care Cats The second time we took him they gave him some metacam which. . Cat tail infections can be tricky to treat so are best avoided if possible. These include boredom stress separation anxiety and obsessive-compulsive disorder. Dont mess with my tail. If the biting is related to a physical problem such as flea. The most common reasons a cat may bite his tail until it bleeds are fleas allergies injuries stress or an illness like arthritis. Pay particular attention if your cat is biting its tail. Another possible cause of a cat attacking hissing at or growling at its own tail is a condition known as feline hyperesthesia. A large amount of sebum produced by the supraca...