New chicks arrived a few days ago, last to hatch (under mom) seemed listless and stood in one spot not moving. Had noticed it's bum pasted with poop. I had already cleaned it 2 times (soaked chicks bum in warm water and used olive oil on a Q-Tip to gently pull away the caked poop). I thought I might have given it a chill since it wasn't moving and non-reactive, yet it's bum continued to cake with poop. I tried the warm soak again to remove more poop, but this time, (Q-Tip in hand) I started to pull out of it's bum what looked like a red string/membrane, rolling it onto the Q-Tip it was about 2 inches long. I figured I pulled out it's intestines or a large parasite. After I did that and warmed the chick up it started eating and drinking and moving about, not like the other chicks but a vast improvement from before. Could that red string/membrane have been a parasite? What could have caused the listlessness and the unwillingness to thrive? I am using ProBiotics in the water now and added medicated feed. Could either of those help/improve the chicks condition? Any ideas?