Can I walk my neighbors dog without permission?
Why would you walk your neighbors dog without permission?
I want to see what it's like to have a dog before I take a big leap in getting one.
It's a good idea to see what having a dog is like before making that commitment, but you definitely need to get the owner's permission first. They'll be upset if they find their dog is missing, and might even think you intended to steal it.
Nah, I just want to try it without asking in case they don't want me to.
You really need to ask before they call the police for their missing pet. It will also make things weird between you and the rest of the neighborhood when they find out you might steal their pets.