Those babies are still little enough, if they and mom are trapped, she can be TNR and they can be socialized and adopted!
Restaurants have a specific time they put out their bags, which is several hours before the trucks actually come around. I don’t remember the numbers but there was an article about it, probably in the NYT because I subscribe for the games despite living in LA. (We use cans and Dumpsters here. Still haven’t got the whole compost thing figured out, though.)
Anyway, see if there’s a TNR organization that can foster those sweet fluffballs!