Ok. If it were a horse I'd know what to do but a week old kitten not so sure. He is very aggressive little thing. There are both males. He just all of a sudden goes for neck or head of the other kitten and starts scratching and hissing. I have to pull them apart the other one kind of just sits there probably wondering what is going on. He then was in my hand and was purring then all of a sudden started biting me and scratching no hissing (this was right after i pulled him off other kitten so wasn't so random I guess). They are little now and no teeth but if it continues an he is bigger not so fun. What is best way to correct? I remember my cat before she died had a kitten biting her and she kicked it away an it persisted and then she bit it and growled. Course I can not kick the kitten but should I take a similar approach?