Kangaroos and Wallabies are both marsupials. Wombats are more friendly and can adapt to routines such as feeding and following you around the back yard. They're not cuddly. Their fur is like steel wool and I don't think they have any of the companion characteristics of a dog or cat. I think it would be like having a pet goat or pig. Wallabies are cuter and more manageable than a Roo. You would need a good height fence to keep it in. Most of the YouTube videos on escaped kangaroos seem to be from the US. Weird. I guess over here they're not "escaped" - they're just doing their thing.