We have had a horrible time with our chickens we lost 8 from the feed store. Not sure what it was, see earlier post. Now we introduced 3from a friend 2 days ago and one of those just started having bloody poop. Ours were treated with Corid before ever being out in the coop any suggestions? Possible worms? Any suggestions for dewormer? Retreat with Corid or is that too much for our chicks who went threw 5 days, 2 weeks off then 3 days? Antibiotics, if so what?