Responses
		
                                                In this one the uke fucked a dog: http://www.mangago.zone/read-manga/how_to_spoil_your_dog_gintama_dj/ 
Incase you're interested :) 
There's also a manga (on this site) where a dude is dating a chicken, fucks it every night and has a baby with it. I don't remember it's name, but I can try to find it if you want~                                            
Wth lol whats the name of the chicken one?

		
He could have used another animal... I know chickens are called "cocks" but... it doesn't mean you still have to fuck it!