The cameras will see if the person is coming/ going. Will see if they’re looking after the dog right and so on. I was a pet sitter a couple of years ago and I had owners like this. It was just their anxiety over leaving them. I think most pet owners do. I had cameras up, they could call me at time, I would text constantly. I did whatever I could to help ease their worries. These were what they asked me too. How will we know if you steal our dog? It’s one of those things where you really need to know your sitter and know your pet and choose the right person.