We picked up 10 3-week old pullets over the weekend from a local family. We got 5 barred rock and 5 silver laced wyandotte. The day after we picked them up one of the wyandottes seemed to be breathing through her mouth, had a funny chirp and the next morning she was dead. Last night another wyandotte had the same symptoms and we also noticed blood in her poop. We isolated her, cleaned and disinfected the brooder, waterer and feeder. I added some ACV to everyone's water. This morning, she was dead. We're keeping their temperature right around 80 and they are separated from our older flock. We've got this young group in the garage for now. Is this coccidiosis or something else? What do you recommend we try? I'm running to the local farm store this afternoon for supplies. We can't afford to lose this whole group. Thanks.