Thank you, will prazi be a good med? Was thinking of prazi and epsom salt?
It could be a dead pup that didn't form properly, I've seen something like this in a dog whose baby was dead.
But you stated that it's a male so this cannot be. It may be some part of the gut if it has not eaten something goofy that it could excete. Maybe get some meds and treat for internal digestive infections.
What meds kno4te Rocksor ?