I noticed awhile ago that a few of my chickens had dirty feathers around their vent and sloppy liquid poos. Then while I was cleaning the coop this morning, there was a poo on the roost with long clearish worms in it (dead). What the heck!? What kind are these (without pics, sorry). Or is there a good thread on here with descriptions of this and cures? I have a few roosters, LOTS of free range hens, a dozen rare breed pullets, and chicks. I'm so afraid they all have this!! Is it contagious? Any info at this point will help me tons. Thanks in advance.