We have been having some trouble finding a good puppy food brand for our 4 month old hound mix Sadie. She has a sensitive stomach and she is a very picky eater. She likes food that has a strong smell or flavor to it. We have been feeding her the blue buffalo but our vet doesn't think the blue buffalo is a good fit for her. We have tried other brands like nutro, natural balence and different Falvors but nothing has really been great or approved by her. any suggestions? Also anything not to expensive?