The dog bites the tail?
It might be a problem with the tailbone

Click for big image

This German Shepard had to be put to sleep because
it continued to bite its tail.

I decided to keep the skeleton and to reconstruct it
to be able to verify if there was a problem with the tailbone.

And in fact, during the reconstruction I noticed an
abnormal ossification process in the form of a triangle
(like an arrowhead) on the fifth bone of the dog's tail.

Perhaps this creates a disturbance that
causes some dogs to bite their tails.

If you have a dog with this kind of problem
I would suggest that you x-ray the whole tail,
because a simple operation might be able to resolve the problem.

Gabriele Pettinaroli