My guinea pig when put with his other Male friend purrs a lot and lifts his butt to show what looks like a prolapse or possibly a clogged grease gland whereas when he is sat normally and calm it’s not visible ? I will attach pictures.
So yesterday I *tried* to put my two boars together and one of them did this thing with thier butt. I can only describe it as a butt throw. He threw his butt sideways at the other pig with his body at a ‘C’ angle.
I’ve tried to research this bahavior but all I got was pee...