My 15 month old standard poodle has had digestive issues with loose stools since we brought him home at 8 weeks. They said he had giardia and was treated with pancur and metronidazole. His stools improved to formed but very soft and sometimes very mushy. I put him on a probiotic at the time and it seemed to help slightly. In December I ran out of the probiotic and decided I would see if he would be ok without it. About two weeks later he threw up twice. I took him to the vet and they did an xray and couldn't determine the cause. I asked if it could be because he came off of the probiotic and they said no. In June he stopped eating and was lethargic. I took him to the vet. They did a full workup along with xrays and an ultrasound and only could see some inflammation in the lymph nodes of his intestines He was hospitalized and given antibiotics. Shortly, after that I called the vet back and explained that while on the antibiotics his stool was normal and when he came off of them they became loose again. They gave him another antibiotic. Two weeks after that my dog was sick again running a fever, stopped eating, and was lethargic. I took him back to the vet and they did an xray, ultrasound again, and performed surgery which turned out to be a biopsy. (They had thought he might have eaten something but he did not). However, they saw inflammed lymph nodes again in his intestines and biopsied them. The biopsy came back and they still do not have an answer for me. Biopsy report just stated he had reactive inflammatory lymph nodes which according to the vet meant that his body is reacting to something. She said it could be food allergy, it could be IBD, but she wasn't for sure. She was going to do some research on Antibiotic Responsive Diarrhea and get back to me. He is on a low fat id diet from Hills Science and I just put him back on a prebiotic probiotic supplement yesterday. I also am thinking about adding a digestive enzyme. I have done a little looking into things and I am wondering if he has Small Intestine Bacterial Overgrowth or Edocirine Pancreatic Insufficiency. Has anyone dealt with this. It has been going on for so long and I don't want him to be sick anymore.