We have been in our "home" park for about 2 months now (temporary medical issue) so we have watched numerous folks come and go. We don't have any pets but the CG here would probably let someone in with 10 dogs and 10 monkeys.
I have been pretty impressed with 90% of the folks with dogs though. They almost always pick up after them.
One MH guest across from us traveled with 3 small yappy dogs and his plan of attack was to let them******all over his site and then once every 24 hours he would patrol the site with a plastic bag and attempt to find all the grass bombs. It was kind of fun to watch him.....it reminded me of an old man on some type of weird Easter Egg hunt!
Well, at least he made some type of effort to clean up after his dogs.