Today, when my cat came in contact with her kittens (which are about 2 months old) she starting making a grr noise and then attacked the kittens if they came close enough. We are trying to get homes for the kittens currently, so we are trying to split them up, but not TOO much.

Can anyone tell my why my cat (Shadow is her name by the way) is acting this way? I don't want the kittens to get hurt.