When I bought my 6 week old lab, who is now 3 months, I just bought her some retriever dog food from Tractor Supply. She gobbled this down like, well......a hungry dog. Then I took her to the vet and he suggested high quality dog food and listed 4. These are very expensive dog foods, such as Iams. Iams, surprisingly, though is expensive, was the least expensive of these foods so we bought a big bag. I gradually changed the food to the Iams, but her appetite has really decreased. She takes a bite or two then leaves it. I have noticed that though she is growing, she seems to have slimmed down. I don't think she likes it. Should I just go back to the cheaper brand she liked better or try another one of those expensive brands to see if she likes one of them? I want the best quality food for her and know that some of the cheaper brands don't offer the best nutrition. I've had her on Iams for weeks now and she likes it no better now than she did at first.