I'm seeing a lot of stinky, runny poop in my coop and run and I'm wondering if it could be coccidiosis? My chickens are 20 wks and 26 weeks, so they seem old for it, but I recently purchased new sand for their coop and run and am wondering if they maybe picked it up from that? It was washed construction sand. I'm thinking I'll treat with Corid and see if that helps unless anyone has other suggestions. I have seen some clear nasal discharge as well.