Looking for comic

A horse [M] is sitting on the toilet when the guy [M] in the stall over persuades him to look under the picture hanging on the wall. The horse, hoping it’s not a dick looks under the picture to see the other guys dick and is then forced verbally to suck it. After a while, the horse (on accident is I recall correctly) bites and after a loud ow the other guy, a wolf, gets out of his stall and kicks down the stall and tells him that hurt very menacingly.

They proceed to continue fucking, a third guy joins in, and I’m pretty sure the horse has been getting bullied by the wolf for a while leading up to this.