Hi can anyone help.? My 2 year old weimaraner has recently started waking me at 5 or 6 a clock with tummy rumbles and i take him out and he just wants to eat grass. He isnt sick , but wont eat his meal until later on when hes been out for a long walk. He recently ate something bad and was ill and the vet sorted it with steroids, anti sickness tablets, antibiotics but he now says hez allergic to everything , but tells me not to change his food. He is on Ava. Any ideas?