So my one year old chin just got over a bout of antibiotics for a parasite followed by some bad constipation. I took him to the vet yesterday and he got a clean bill of health (his fecal test came back normal). He is now pooping just fine (it is really hard now), but I still notice a slight smell. You got to get in real close to smell it, but it bothers me that it is still there. Could it be that he is still passing the built up gas or is this just how he probably is?