Tylan 200 is what I use but it's injected so if you don't know how to administer, better to let a vet perform the treatment.Thank you all for your replies thus far! He is still hanging in there, we have dewormed per vet with panacur, we have given rooster booster poultry cell, we have given olive oil/massaged crop. He has been seen eating and must be drinking to be alive. 2-17-25 he’s been offered poultry cell via water bowl and offered vetrx via water bowl, moved to our bathroom with humidifier. It is definitely respiratory now that we have observed wheezing/rattle sounds. How do you treat respiratory? Thank you all so much!