My 22 month old Doberman/Lab mix is not eating well. We had problems with him before. When he was 1 year old he weighed 120lbs. Then in the fall we had him to the vet because he was vomiting every day and not really interested in his food, they weighed him and he only weighed 103lbs. His ideal weight is 115lbs - 120lbs, even though he is still "safe" at 103lbs. The vet tested his stool and it was fine so she thought maybe he was allergic to chicken. We feed him good quality food but it was always chicken. We switched to a lamb & rice formula and for the first couple of months he tore right into it. We go back every month to have him weighed and he has gained about 1 pound per month over the last 3 months. The vet said as long as he didn't lose anymore, we didn't have to come back. The past couple of weeks he hasn't wanted to eat much and now he is vomiting again because his stomach gets irritated when he doesn't eat. Has anyone else experienced this? I am really worried about him. We have to have him weighed again this week, but I am scared to know. Any advice would be greatly appreciated.