So, we have two, couple month old Khakis and two, one year old Pekins and the Pekins often case and sometimes bite at the khakis and I was wondering if there was a way to make them get along better? The Pekins are one girl and one boy and the khakis are too young to determine gender. We also wanted to introduce one more girl to our flock and I was think maybe a full grown welsh? Would that work? How would I do that so they'd get along? Or is there any other better breeds to add? Thanks!