I finally combined my 2 flocks today. The older flock consisted of Leghorns,Golden Comets, and EE's that were born in March and April, and the younger flock had Wyandotte/Marans crosses,Wyandottes, Barred Rock, Light Brahma, Australorp, and 3 Guineas that were all between 2-3 1/2 months old. They are all sweet birds. What can I expect ? Are they going to fight ? Do I need to do anything special ?