whats up with that...i got 7 five week old chicks and they are killing anything i put in with them...the chicks that were put in with them were about 3.5 to 4 weeks old and not much smaller than the killers...whats up with that...is this normal...dang if this keeps up i'll have to build seperate pins every single time i hatch eggs...anyone else have this problem...the pen i keep them in is a 7ft long x 4ft wide x 40inch tall...