>>149850394
The guys are watching through a hole in a fence as the chad character is about to fuck Bull's gf in his neighbor's yard (they're both winners of a breed competition and highly desired). Bull's pals prop him up to interfere, he ends up bouncing off a trampoline right onto her back, slides down just enough for his dick to slide in, so he knots her. Chad doesn't notice since he's in another world, raving on about how great his lineage is and whatnot, so what ends up happening is chad knots Bull thinking he's fucking the bitch. I kid you not, it's a three-way knot where Bull the mutt is in the middle taking it in the ass while thrusting his dick in this pure-breed chick. Chad finally realizes he's fucking a mutt's ass, wants to run into the traffic in shame only to realize they're stuck like this. The knots finally pop off, Bull is left with his chick (traumatized by what just took place) and chad, after being thoroughly humiliated runs off and is never seen again.

Later we get a massive litter or half-breeds and Bull gets his happy ending (he's now the popular guy at the block).

Yep, it's a doozy.