I adopted Chubby last week and he was very underweight at 7.5 pounds the vet said he should be more like 10. Chubby has really filled out from what he was. You could see all his ribs before they were sticking out but now you can only see them occasionally. The first time we brought him home his pops were very small and he pooped 3 or 4 times. Now they are long and he poops anywhere from 4-9 times. In last week he went up to 7.8 pounds in weight. He eats the Iams that my bfs dog eats and he seems happy with that. They tell me that at the shelter he ate Purina Pro Small Breed. We free feed both dogs and we had been feeding Chubby some treats and things. The other dog has always free fed and I really dont want to change that. Both dogs just eat the food when they are hungry. I just want to know if my Chi is pooping too much or if this is just a result of his bodily weight changes. Also if this might be a territorial marking thing? Since he does it in pretty much the same locations and I know many of those apartments he poos near have dogs in them.