They will be ok. I call it "Play fighting" and they start doing that as wee little ones. As long as they are not drawing blood and trying to really hurt one another, I would let them just go on and play.

Samanth and the rest of mine have had some issues and there was a lot of slapping and hissing going on but they have worked it out now and they are all getting along so much better. They have come a long way in 4 months.