My chicks are now 8 days old and I have 1 light brown leghorn that was small to begin with but has been doing ok. Tonight she started acting strange - not moving alot, breathing hard at times and the others were running over her. No pasty butt - I check them several times a day.She eats and drinks but it takes effort - almost like a baby with a heart defect (peds nurse here guys). The brooder is at 85-90 and her temp felt fine. Since the others were running over her I separated her out - Should I have done this? Any advice?