We are new to chickens & have learned some things the hard way. I posted part of the story in my introduction so I don't want to be redundant. We have an original remaining flock of 1 rooster & 2 hens about 2 yr. old. We lost 2 recently to a predator (who is hopefully being trapped as I write), 1 to a ruptured tumor & another returned to the original owner because the rooster would not leave her alone. My husband acquired 10 buff orp. chicks that are now 5-6 mo. old. We had the chicks quarantined in the garage until 2 mo. ago. My husband built/added an area for the chicks adjacent to the older chickens pen. The chicks are now as big as the older chickens. They have seen each other for about 2 months now. We think there are 2-3 roosters in the new bunch. One has started to crow. Can we put the 2 groups together now & how do we go about that? I also worry about their health. We have had terribly hot & humid weather (alot of us have). When the buff's tumor ruptured, before we knew what happened the 1st thought was Coccidiosis. Would it hurt to feed medicated food for coccidiosis? I don't want to medicate if we shouldn't but we've had so much loss already & want to prevent it if it's a good idea.