I got a new hen yesterday 18mo and put her in with my 18mo rooster who has 2-10 mo old hens with him already. When I put her in she avoided everyone and went straight to the roost. I went inside to get some scratch to throw down so they could get to know each other and when I came back the rooster was beating up the new hen. She was just laying on the ground and the rooster kicking and pecking on her head. I immediately picked her up and looked her over she was bleeding on her face area that all I could tell that was wrong. I cleaned her up and gave her some chicken vitamins and put her in a pen byherself she stayed on the roost and closed her eyes. Today she's moving around very slowly and staying on the ground but she is eating and drinking a little. Looks like she's sore or in pain. Should I give her some pain meds like advil or something like that? How much if I do?