Semi hard, not interested horses, dogs being used as dildos, or letting their cocks get dry while some dipshit is trying to blow the dogs' front portion of his shaft, which if there is real scene related audio, you'd no doubt hear the whimpers of pain from the dog. None of these commercial vids have any active animals, let alone the people involved being zoos. The commercial garbage for the most part, use animals as a fetish/kink like a fucking dildo, with NO love for the welfare of the animal. A classic example is the black great dane, sometimes referred to as Hector. That poor boy is starved(look at his ribs showing, along with his spine. That's not show quality, that's lack of food and/or poor health), and manhandled just to make a lame video.
The sooner these types of videos are removed, the better this forum will be. And, there won't be any bad ideas for those new to being a zoo, that won't harm their four legged friends.