We've had this happen 3x in our 20+ years of chicken raising history; where the hen's guts starting coming out after laying an egg. Two of the times, we managed to catch it right away and we treated it with raw honey. Weird huh? But it worked AMAZINGLY well! Raw honey somehow shrinks the guts and makes them go back in within an hour and it's also an amazing disinfectant, so no risk of infection. The third chicken we didn't find until her guts were dragging on the ground behind her (uuugh) so we didn't even try to save her (she was old), we just put her out of her misery. But if you ever see that happen to one of your chickens, remember to rub some raw honey on the guts right away. Not much is needed and it works immediately!

Just thought I'd share. Someone mentioned a messy chicken butt and it reminded me of this helpful homestead chicken-butt tip!