Ah, the holidays when friends and strangers drop in from all over. Check this pair out who have learned to beg at the back door. Too charming for our own (or theirs) good. They have learned to eat cat food and pose in the door just like the cat and be wistful, outside looking in.
Beware, they are a danger to your pets, and don't encourage their visits (alas) by leaving the food out. Sooo tempting and way cunning, very hard to resist, but resist we must. They are omnivorous and opportunistic and can become dangerous.