Has anybody ever had problems with dogs losing large amounts of hair after using capstar??

I have had it happen to my belgian shepherd and I know of one other dog which was a german shepherd with the same problem.....will be interested to see if anyone else has the same problem....Cheers Kez.

Has anybody ever had problems with dogs losing large amounts of hair after using capstar??

I have not had this problem, although my use of Capstar was limited. (I now use Revolution) Sounds like what you observed was a very severe reaction to that particular medication, indicating that you should not use it again on that dog.