Sometimes I like to go to my neighbor's house and pet their dog without them knowing.
Do you think it's appropriate to pet their dog without their knowledge?
I don't think they care whether or not I ask first.
I would still just ask them really quick. Some people tend to get upset if you go onto their property without getting permission first.
No, I think most people don't care.
I get wanting to pet your neighbor's dog, but going on their property without their permission is trespassing and there is a good chance they will get upset. The best choice would be to be respectful and ask them and if they're fine with it then you can pet their dog without any worries.