I cannot find any visual bump or anything like that. If I run my finger over his/her vent i can feel it. Might be a small obstruction? Maybe something he ate and couldn't digest. He seems to be acting normal so far. Hopefully he will poop it out
Ok, it is possible he ate something that could have caused a slight impaction or bulge, or could
it be just part of his bone on the pelvis?
Let us know how he is doing. At least he is acting normal. Is he eating really well also?