Weasels don't usually leave a mark but.....they usually don't kill a bunch at once.
Raccoons usually kill the whole dang flock. The interesting thing is I've had them stack them like cord wood, or haul them out and stash them in a pile. They also usually aren't too messy.
Coyotes, fox, dogs usually make a mess, or the critters end up missing.
Cats, often kill the flock....all of them. Like a sport