Question

My 7 month old Golden Retriever has been to the vet this weekend. We brought him in because he was not sleeping through the night due to bad diarrhea. He threw up a two times in a week, but mainly it was the mucousy feces. The vet tested for Parvo, which was negative. He had no fever, and has had a normal temperment. The vet took X-Rays, and did not see any major signs for concern. Per the vets directions, we have him on an anti-biotic (Metronizadole). We also have him eating rice and chicken, in small doses throughout the day. He eats everything he gets, and is really hungry after. We still notice mucousy poop, and he threw up last night again. He does not have any diarrhea, though, as he has been on a limited diet and does not go to the bathroom much. I'm concerned that he's still going to be having bowel issues afterwards. What would you recommend are our next steps?