I have one male guinea pig age 1. I took him out of his cage this morning to clean it and put him on the floor with some newspaper. I noticed a bit of diarrhea on the newspaper and a bit smeared on his leg and his butt. There was a lot of poop in the cage from overnight that was normal - not diarrhea. (I'd cleaned it yesterday evening so all the poop was from overnight.) He's laying around now but that is what he usually does in the morning/early afternoon so I can't say his behavior is off. Anyway, I have noticed that his anus (I guess it's his anus -- circle where the poop comes out) is kind of weird and has almost a growth in it and coming out of it. It almost seems like a small penis but I am sure his penis wouldn't come out of his anus. His butt area (for lack of the correct term) also hangs really low and I always though that was his testicles bc it's almost like two sacs but I know that can't be right. I will try to get a photo of this but right now he's sleeping. Any advice for the diarrhea and also is it normal to have some extra skin around the anal opening?? By the way, he's had this extra skin since we got him two months ago and has never had a problem pooping so it's not impacting him. Sorry I am probably not providing enough info and I'm clearly ignorant. Any advice is appreciated. Thanks!