I did dog walking in Oxfordshire for two clients. My one client had 3 little pooches who came out on hour long walks over hills and dales. I'd feed them and check they had fresh water until mom arrived home from work. My second client has an adult whippet, who also liked walking the same area. I used to stay with Claude for several hours until his family returned home. I would also check that he had fresh water and his favourite toy close by