I am a Pre-Pharmacy student, but I wondered if anyone might have experienced this with their own dog. Every now and then, my white German Shepherd has what I can only describe as "licking fits". He licks the carpet, the walls, and will voraciously try to eat any edible or non-edible item he can find lying around. Obviously, this isn't his normal behaviour. He usually ends after an hour of this with vomiting frothy yellow fluid. And then he is fine. The vet I have taken him to can't find anything wrong. Anyone heard of this condition? Thank you so much for any help!!!!