My mate's dog spotted my chameleon one day and he freaked out whimpering, as if to say: "what the hell is that weird alien looking thing!??". The dog dint bother my cham tho cuz he's high up and dint even notice the scardy dog.
First I want to say that I would not advise anyone to leave their dog or cat around there cham. I stay home with my pets and have a very special relactionship with them. My chams free range and my dog Red gets along great with my chams. Below's a video I made of Red and Luie awhile back.