Sharon Talbert wrote in message . washington.edu...
I haven't seen the hair loss you seem to be describing, but in case you
actually meant the hair loss to have started from the base of the tail
(nearest the body), it could be the following:

If the cat is intact (not neutered), he may have "stud tail."

Just FYI, neutered male - and even female - cats can develop stud tail.

-L.