In reality I'm not sure how you could ever do it safely but speaking hypothetically... yes, absolutely.
My wife and I are pretty big into group sex, being watched, her being gang banged, etc. In an ideal world thowing some male and female dogs into the mix for people to fuck and be fucked by only sounds like more fun to me. I just doubt its something that could realistically happen. Organising human only stuff is hard enough... I can't imagine how you'd begin to go about ensuring safety with something thats sadly so illegal