Our three yearold lab has always had a problem with his stomach. He won't eat at times and his stomach makes all kinds of gurgling and squeaking noises.He throws up and then when he poops his poop is looks more like mucus than it should. After these episodes he returns to normal but this problem has been a constant since he was a puppy. He has had all his shots and goes regularly to the vet. We can't seem to get through a month without this happening at least once, but it almost never last more than a day.
You pet may have inflammatory bowel disease. It does not sound like a serious case but you may want to try eukanuba low residue diet. vetcare