i have a big 2 yr. RIR roo, & 4- 2yr. old standard size hens, i want to know if i can put my new babies in with them, they were born 4-17-08, which makes them 3 months old, they are , 2 barred rock pullets standard size, & 3 silkie roo,s & 1 silkie pullet, & 1 australorp pullet, can they be put together in an inclosed run, 10x20 with a coop, will the big rooster hurt the little silkie roo,s or hurt the silkie hen? or will they be ok?? i have them in a smaller pen right next to the bigger run, so they do know each other.