Cave critter

The cave critter is small creature about 0.7 Blocks high. It body is round with small arms and legs. It mouth is large and its yellow eye are forward facing. It has rough leathery skin and wear crystal as amour oh their head. They just a little slower than an baby zombie. They have 5 hit points and they have 2 amour point. They eat stone and cobble stone on sight. They are passive and will only attack when attacked. They dispense out sand after eating some stone after a while. They spawn in caves deep below. They run away from torches that player places.