No. It’s always appreciated when clients tell me to feel free to help myself to food, but you don’t need to and in general I will replace any food I consume.
If your dog has separation anxiety to the point that I will be unable to go out and do grocery shopping even for an hour, it would be appreciated if you could provide basic supplies for the first day until a grocery delivery can be organised.
You do need to supply enough of your dog‘s usual food and treats to last through the booking!