Our 11 week old Cavalier King Charles Spaniel seems will never cope with any normal food. We are first time parents, please please feel free to advise. Got Lemon 3 weeks ago. Fed moistened JWB when came home. Got diarrhea straightway. Two days later, could see blood trace in poop. Brought him to vet and given Hill's I/D tin food. He then became better and completely settled down about 1 week later. But it's not over yet... In the 2nd week, we then started introducing 1/3-1/2 JWB with the rest of Hill's I/D. He started runny poop almost straightway. But it's not too bad, just been able to pick up. We hoped he could get used to that, but not at all after 1 week. In the 3rd week, we ran out of Hill's I/D. We started to feed dry food only to have a try. As Lemon really hates dry food alone, he ate very little, about only 1/3 of suggested daily feeding. We thought, fine, since you can't digest dry food very well, just eat less for the moment. His poop got more runny then. This morning we made another change to go back moistened dry food to see if this could help. But out of our expectation, he got worse poop. Can not see the shape of it at all. We are a bit hopeless now. Did we introuduce the food too fast for him? Or he's probably got some problems like colitis? Or anything else we d better go to vet do further test? During the last 2 week. We tried JWB turkey/fish, Hill's science plan, Berrimans, all for puppy. We didn't see any difference so probably he's not ok with particular brand but all dry food. We got Lemon from a bad breeder with fake pedigree. Therefore it's impossbile to get in touch with him. Thanks for reading this and would appricated your help.