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Dr. Kara
Dr. Kara, Veterinarian
Category: Cat
Satisfied Customers: 14856
Experience:  Over 20 years of experience as a veterinarian.
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Our 3 year old male, neutered, healthy, active outdoor cat

Customer Question

Our 3 year old male, neutered, healthy, active outdoor cat has over the last few months suddenly become obsessed and even scared of his own tail. Initially we thought it was some sort of game, chasing and biting it. However, over the last week it seems more than that, he's now growling at it and trying to escape from it and clearly distressed. We have checked the tail and his backside, there are no wounds, fur loss or fleas.
The tail is flicking, presumably he's doing that but acts as if it's some sort of threat.
Any ideas??
Thanks Jan.
Submitted: 1 year ago.
Category: Cat
Expert:  Dr. Kara replied 1 year ago.
Hello, my name is***** and I have over 20 years of experience as a veterinarian. I am very sorry to hear about your fellow's discomfort. Allergies are the most common cause of itchy, uncomfortable skin. And flea allergy is the most common allergen. It seems to affect the tailhead and back area most so it is definitely possible, especially since he is an outdoor fellow. I know that you've checked him for fleas but if he is very sensitive he may be removing the evidence with excessive grooming.I'd use flea protection every 28 days. Both Advantage II and Frontline Plus work quite well at killing fleas and are less likely to create a skin reaction. I don't normally recommend flea collars but the new Seresto Flea collar is excellent and provides 6-8 months of continual protection. Other allergens are inhaled (like mold spores or pollens) or food allergies.To treat his allergic reaction to the flea bites (or inhaled allergy) I recommend antihistamines and omega-3 fatty acids. Some antihistamines to try are:1) Diphenhydramine at 2mg per kilogram or 1/2 of a 25mg tablet per 4 to 8 kilogram cat 2 to 3 times daily. You can crush the pill up and hide it in something tasty like canned cat food or you can give it directly. Make sure whatever you use is diphenhydramine only as the combination products with decongestants and acetaminophen are toxic to cats.OR 2) Chlorpheniramine 4mg per cat once or twice daily.OR3) Zyrtec (Cetirizine hydrochloride) at a dose of 5 mg per cat given orally every 24 hours. (Make sure it is NOT the formulation with a decongestant (such as Zyrtec-D) because cats cannot tolerate decongestants.)Omega-3 fatty acids will work synergistically with the antihistamine to soothe his itch and as a bonus will improve his hair coat and skin condition in general. I like the products by Derm Caps or 3V. These come in pump form to put on the food or you can puncture the capsules and dribble it on his food.I recommend a dose based upon the EPA portion (eicosapentanoic acid) of the supplement as if we do that the rest of the supplement will be properly balanced. Give him 40mg of EPA per kilogram of body weight per day. For example a 5 kilogram cat could take 200mg of EPA per day. Antihistamines and omega-3 fatty acids work synergistically. These should help reduce the itch. Be aware that antihistamines can cause drowsiness or hyperactivity which should resolve with continued use. Another possibility for his discomfort is a condition called hyperesthesia. Hyperesthesia is a poorly understood syndrome which is difficult to diagnose. These cats have pain and hypersensitivity to touch on their back and tails. They sometimes will bite at themselves because they are so uncomfortable. It is a poorly understood disease process with no definitive test for diagnosis and so other problems (such as spinal arthritis or infections or allergic reactions) should be ruled out first. We do know that stress does seem to make this disease process worse or flare more frequently. Sometimes mood altering drugs and steroids can be helpful.Here are a couple links discussing hyperesthesia syndrome if you are interested: http://www.veterinarypartner.com/Content.plx?P=A&A=1998&S=4&SourceID=62http://www.cathealth.com/hyperesthesia.htmI Another condition which initially causes pain, but can later lead to urine and stool incontinence is lumbosacral stenosis. This is a narrowing of the bony canal that the spinal cord travels through, either due to weak ligaments holding the vertebrae in place or arthritis changes in the vertebrae. It is more common in dogs than cats but it can occur in cats.Has he has ever had radiographs of his spine?It is possible that he has a slipped intervertebral disc (the soft cushions between the vertebrae which allow spinal flexibility). When this happens pressure is placed on the spinal cord which is quite painful.Since he goes outdoors he may have had some sort of trauma where his tail got caught and the nerves were stretched. As the nerves regnerate there is a tingling, sometimes painful sensation which can lead to the cat chewing or biting at the area.LS stenosis and a slipped disc can sometimes be diagnosed with regular radiographs sometimes but many times an MRI or myelogram (dye study of the spinal cord space) is needed. Anyway in your cat's case I would start with trying to control allergies and if that doesn't work then he needs a thorough examination, as well as bloodwork to make sure internal organ function is normal, and a urinalysis with culture to look for a urinary tract infection, as well as radiographs of his pelvis/spine. If that all looks normal referral to a neurologist for an MRI may give you the answers that you need.Let me know if you have any further questions.

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