My brother used to eat the dog food!
DS managed to eat our dog's food once before I started picking her bowl up and I only did that because my FIL was so grossed out and wouldn't stop pest.ering me about it. Our dog "kisses" DS at least once a day and he loves it and giggles and really enjoys the attention.
Having said all that - I would probably feel a little differently about someone else's dog so the question isn't silly at all.