My 4year old chocolate Labrador suddenly went ill with vomiting and pyrexia took him to emergency vet and back to my own vet the vet did a x-ray on his stomach on the Wednesday took him back again on Thursday everything in gut was the same so they operated thinking he had a blockage but no blockage looked higher to the stomach half his stomach was black the lining had gone and an ulcer that had come through the stomach wall and it had stopped the gut working the vet couldn't do nothing for him so heart breaking and shocked at having to put my boy to sleep animal friends wouldn't pay the insurance as he had colitis (which was under control through diet and no episode since he was 8mths old)had a letter from the vet saying that the 2 weren't related and the vet phoned them also,so be very careful about animal friends I'd never use them again