When we picked up our 4 yr old Collie from a 4 day stay at the kennel [considered top in area]. We were told to keep an eye on his stools as his most recent one was diarrhea like and some blood was evident. Later that evening we noticed blood in the stool again and at 2 in the morning took him to the emergency vet just to be safe. He was given antibiotics [several day program] and something to firm up stools. That seemed to work. Several days later I gave him about 4 tablespoons of plain yogurt in his food thinking it would be good for intestinal tract. Then his stools began to look like pudding. A couple days later they began to firm up again but now have gone back to pudding texture. The only other thing I noticed was he was licking excessively at an area on his groin. On inspection that was about 5 or 6 small red sores almost like bites. I trimmed some hair that was matted away thinking that was the problem but have since thought that the matting was caused by dog licking the area. He appears fine in other respects and I am not sure another vet trip is necessary as it may all work out but thought I would ask for an opinion.