Why is my chihuahua biting his tail?

Why does my 2 yr. old Chihuahua keep biting his tail? He bites it and it bleeds everywhere.
He knows it hurts him because he cries when he is biting it. The vet gave us a pain killer to give him and an antibiotic. But he does not tell us why he is biting...

it.

It could be because he is a really nervous dog, boredom or he has a "hot spot" dogs will scratch/chew at a bothersome hotspot. Try a different vet or visit a pet store. Get one of those big lamp shade looking collars to keep him from biting it and so it can heal. Then after it's healed try getting a product called Bitter End that will keep him from biting. (same concept as the stuff nail biters use)

I don't understand--your vet doesn't tell you why? Did you ask him flat out or just accept pain killers and leave?

Go to a different vet, never heard of this problem. It could be a mental disorder the dog has. My friend's dog constantly licked it's paws until they bled when his brain started to deteriorate from cancer.

Go to a different vet, don't take "I don't know" or "no" for an answer!

mabe its bordem so take it outside for a while and play ball with it or mabe its fleas I would sugest going back to the vet or even writting a letter to dr Harry!

the tail is the number 1 spot besides behind the ears for fleas... he may have fleas. check to see... soemthing on his tail is obviously irritating him you should check it and see what there is.. if there is anything on his tail