One of my 9 weeks old Tetra Tints has a sore above her beak. The other TT in my flock has been pecking at the other 2 chicks the last few days so I think that's where it came from. They have plenty of space, food and water, as well as attention. I'm not sure what's going on. I have wondered if the pecking one is a roo, but there's not many pics of TT Roos out there. Its face and comb are much redder than the other. I'm sure I sound like an idiot. I don't know what I should do. I don't want my chicks to be hurt. Help.