We have a rooster (unknown breed - given 18mo ago as a bizarre gift to my husband) and a Specked Sussex that we took over from a friend who was unable to keep her. Happy chicken couple. 4mo ago, she clutched & went broody. At 22 days, nothing was fertile, but hubby & daughters really wanted to see the Speckled (Veronica) raise chicks (yes, I know we waited way long). We went to the local feed store & bought 4 day old chicks & tried a swap out. No luck. Veronica didn't fall for it. She attacked the chicks & abandoned the best. So, the chicks went in a brooder. We started introducing them 4 weeks ago, when it was warm enough, in a controlled situation. They're 8 weeks now, and I want them out of the playroom, but whenever we try to get them together, the rooster goes crazy & attacks - even when placing them in the coop after dark. He tries to chase them out of the yard, too. Suggestions? What are we doing wrong?