Congrats on the first egg! Always exciting.
I recently moved my 10+ week old chicks to a sectioned off area in the coop. My intention was to put half the chicks in with one flock, and half with the other. I put the first lavender Ameraucana pullet in the pen, and the Ameraucana rooster did a little dance at her. I was walking away to get another pullet, when suddenly the rooster went ballistic, charging the chicken wire pen over and over. The pullet was trying to fight back, and I was worried he would kill her. He would not let up, and I had to kick him outdoors, to retrieve the little pullet. The rooster never shows any aggression towards me, but he seemed to think this little pullet was a serious invader.
I decided to put the pullet in the pen with the Basque rooster. He also did a little dance, but that was it. Every time I came in with another pullet, I had to shove it under some chicken wire, so the pullet would squawk. The basque rooster would come running at me, to protect the bird. He never touched me (I think he knows better), but he was very protective of these new pullets, so I'm letting his flock keep all of them. Unfortunately, I think I'll be doing in this Basque rooster to make room for the golden cuckoo. I could make room for another flock, technically, but I'm already overrun here.