Like Heather says, that's all pretty normal...Just wait til they get older!!! Buck & Tia used to sound like they were killing each other, but other than a few scratches, they were fine..Also learn your babies body language, just watch them, you will soon be able to tell what is play and what isn't....To me, there is nothing more fun than watching 2 boxers just having at it, could sit and watch them for hours...