Need some advice on the proper way to introduce new birds to each other. I lost a bunch (still not sure why) But have one male left. In another pen I have 10 that I hatched in June that I kept. Can I put the younger birds in with this male now or not? I hate to cull him. He has been wormed and through a dose of antibiotics. I sanitized the pen and moved it. (Since I don't know what it was I tried to take every precaution). He has been alone for about 3 weeks now. Advice or input needed thanks! Both sets of birds were hatched here from eggs.