Racoon are notorious for reaching through fencing and doing that. They're sneaky night time killers, even though you haven't seen one doesn't mean they are not there. Unless of course you live somewhere racoon don't exist. Foxes and coyotes usually take the whole animal and unless their head can fit through your fencing is more unlikely, skunks go for eggs but will kill chickens. However they have very short toes and legs so reaching and grabbing a good grip is unlikely as well.