I know this all set super confusing. I got baby chicks from a poultry swap. From a "reputable breeder". I was too relaxed about quarantine. I put them with my other chicks. They were in a different section of our barn. One by one baby chicks had swollen eyes, gasping for air, a couple died. I started treating them with Tylan as I suspected Mycoplasma. They stopped dying. I only treated sick ones. Then my big girls started to get sick. I had one big one that wasn't leaving the coop and was fluffed up. She was the one I took to the vet. She was fine without treatment. Although today she's kind of doing the same. The vet said based on the whole picture it was Mycoplasma.
Everything was going fine for about a week, then this chicken Little Dilly, wouldn't come out, was falling over, her eyes are swollen and dialated. I didn't think she would make it. Treated with Tylan and she's coming around. Since we had her separated I noticed lice crawling on her. I've searched all the other chickens and have found nothing. I've been checking her poop and all of the chicken poops, this was the first I've seen. I checked all of their butts last night. She's the only one.
Ugh. 7 years of raising chickens, and I've never had to treat, or had sick chickens. I'm exhausted.
I completely got rid of hay and cleaned the entire barn yesterday. Switched it all to hemp Bedding.