What kind of pet owners would leave their pets without enough food and water until someone could check in on them?? And to not tell you where everything is, is totally irresponsible in my book.

I have a pet sitting business. I make SURE my clients have me over and give me the layout, where everything is, vet phone numbers, etc. I then meet the pets and spend time interacting with them.

I'd have a little chat with them if I were you. But that's only my opinion.