I have small children. My 3 BR pullets (about 18 weeks) are getting too aggressive in their search for a treat. Any tips? They come running every time we step out the back door, expecting a treat. They start pecking at our toes and today they jumped up and knocked a small toy out of my 3 year old's hand today. It kind of scared me. I need them to be nice. Our 2 RIR's (one month older) don't do this. They will even let us pet them. The BR run away if we try to pet them. They just aren't as friendly. Is that just the breed? Anything we can do to fix it?