I came home from work to find that my basenji, Noah, had a big patch of missing fur on his tail.

He will occasionally pull his fur out, but in this case, it's much more extreme.

I've taken him to the vet, and he thinks it's just caused by stress and I should take him running in the morning. I'm worried it could be something worse.

Has anybody else had a similiar issue? Any suggestions would be very helpful!