There are a few different threads about using apple cider vinegar on this site..
I add it to my "pack's" drinking water. I think it helps with skin issues, eye gunk and fleas. My vet told me one flea bite can cause a reaction! I have some problems with one of mine even with the flea preventives.. he doesn't have fleas but while walking I guess he does get bitten

I also agree with the advice given... grain free

And I add salmon oil to my furbuts diet.. it really is a mission !! It has gotten better, a lot better
http://www.yorkietalk.com/forums/yor...r-vinegar.html http://www.yorkietalk.com/forums/yor...-eye-gunk.html