Honestly, if a dog is bought to help someone with a disability, mental or physical, then it is a service dog... That dog should be able to go with them where they need it, it's not a pet or a companion if its offering a service. Whether it brings their socks, guides them to a toilet or just offers them security and reduces anxiety. I do believe that should be regulated though. How, I'm not sure. I think it's more about proving you need the dog, rather than what the dog does, and having the dog trained to be acceptable in public. Whether that's for a child or an adult.. Meh. If the dog is helping, it's helping.