I have a 3 year old Golden Retriever. For last two years I have been trying to figure out what is wrong with him. After each feeding (3 times a day), he seems to be not feeling well. He paces, stands and makes noise with his mouth, swallowing constantly, he belches, gets gassy, and his stomach gets so noisy that I can hear him across a room. He also lost weight and has problem to gain it back. His stool starts normal, but ends soft. I tried different brands of over the counter enzymes and probiotics, but they didn't seem to be helping. His stomach was even noisier and the belching was also worse. The last thing he was put on was Pancreatic enzymes, which seemed to be making him burp up a liquid which then got into his air passages and he had reverse sneezing episodes. He had done x-rays of esophagus and stomach, abdominal ultrasound, fecal exam, stool culture, complete blood count, blood chemistry. Every test was negative. Only thing I remember the vet mentioned after the x-rays that my dog's stomach looked flacid. There is a suspicion that he has digestive motility problem or a defect in his stomach. The next suggested test is barium x-ray. I would prefer not to do the barium and I was wondering if anybody run across problem like my dog has. Otherwise my dog acts normal, he has good appetite, energy, he is playful, it is only after the feedings that he doesn't feel well. One more info, he was fed dry food his whole life, I am in the process of switching him to raw. Any advise would be appreciated.