Thank you everyone for all of the information! I really appreciate it! The golden comet that was looking sickly today was actually spunky again this afternoon which is good, but I know I still have a problem since I saw the worms in the poop. The only thing I was able to find at the feed store was ivermectin paste, not a pour on, although I do remember seeing a safeguard product, or something with fenbenazole (I'm not sure I got that chemical right). The lady who runs the feed store called a friend who has years of experience with chickens and said the ivermectin paste was really strong and wouldnt be good for the chicken, so I got nervous and didnt give it to them. I sprinkled DE all over the run and coop when we got back, and gave them food with probios added. Believe it or not, our problem started when we started "free ranging" them in a chicken tractor a month and a half ago. We have a bunch of black birds that congregate in our yard every day, and the woman mentioned that they are probably bringing in the parasite. We had stopped letting them out on grass when the one chicken got sick the first time, but when she was better, we put them back out on the grass, and now they have worms again. Does this mean i can never let them out to graze? I'm pretty sure they have roundworm...that is what our golden comet expelled the first time around. I still dont know what I'm confortable doing though. Everyone has different opinions on what to do/use, and I want to use the right thing. I like the idea of the wormer that kills them over a few days, but I'm not sure what I should do now that they've had access to the wazine now. It is a really hot day here (low 90s) so they're drinking a good amount of water, but worming in the heat (from what I've read) is not good either. I have a dog crate all ready for the sick one to bring her in, but we have a/c, and I put the temp to 80 inside, but I'm afraid of shocking her body with the extreme temps.