Although we have a dog, I have had to reluctantly enforce a 'No Pets' policy because, every policy I have ever had anything to do with is open to exploitation.
As well as a dog we have a garden, and one we put a bit of effort into, and our dog is a social dog, no neurosise about strangers. But one woman who was clearly deceptive about the size of her dogs turned our rear garden into a virtual desert wasteland. Even mature Rose bushes were broken off at their bases, About 70% of our garden was destroyed....... so that's it, since then, although I love animals, no guests animal is welcome here.
Friends with animals respect your environment, guests with animals don't!
But having said that I do think this would be a fine topic for discussion!
Cheers.....Rob