Critters

There were 4 Critters films, 3 made in the 80's part 4 in the early 90's.

The central focus of the series is upon a group of carnivorous alien creatures called "Krites". they have the ability to roll into balls not unlike a hedgehog they can also combine into a pernicious sphere if necessary or just for fun. they resemble small furry/spiky animals with large mouths and many sharp teeth. think Tasmanian Devil but from space, with attitude and with spikes on their backs that can be launched at their victims rendering them paralyzed and/or unconscious . they attack humans (usually in groups) by biting and attempting to eat them, or at least a piece of them.