Can you bring something with you when you pick him up like cheese sticks? Those are typically not too messy and come individually wrapped. Plus, they are high in protein. How about half a sandwich? Annie's bunny crackers? They are tasty and come in individual packets.
" I object to violence because when it appears to do good, the good is only temporary; the evil it does is permanent." Mahatma Gandhi
"This is the ultimate weakness of violence: It multiplies evil and violence in the universe. It doesn't solve any problems." Martin Luther King, Jr.