Yet mostly unlikely. As someone who has been in business for going on 22 years, and who is and has been in multiple pet sitting/dog walking forums, it is very rare and usually a job we won't take on as we need to make sure the dog has water when we return. We don't leave dogs outside unless the dog is somewhere in the country. Also, an expensive dog like a purebred Malinois is not going to be left outside due to potentially being stolen, and that's beyond more practical reasons like weather. Case in point we are having storms here today. It's thundering. I just finished walking my group of 3 dogs and I've been inside all 3 houses. One dog needed water and food, one is in the living room behind a gate and the third has free run of the house. My clients have always given me free run of their homes. None of them wants their dog to be outside in thunderstorms or extreme heat or cold.