I have a DS1 a 2year old who is constantly picking on DS2 who is 7mths. He bites, kicks, scatches, pulls his hair etc.. and I really don't know how to handle it. My kneejerk reaction is always to pull him off and shout at him but it doesn't make any difference. DS2 has learnt to scream very loudly when anything happens but this means he screams all day and that makes DS1 worse he then gets more and more aggresive...please help.