Two of my red stars are showing signs of Coryza or something very similar. One of them has had it for a week or better and the other just a few days. They both have drainage from nostrils that is sticky and has a foul odor. They are both still laying, eating and very active. Also have a Black Australorp that has been constantly sneezing but with no drainage for about a week now? I did a nasal flush with a solution warm water and Tylan 50 for the Red Stars and also injected 50cc in the breast of each of the sick hens. The first two hens I injected with no problem. The third hen I injected and when I was almost done injecting I noticed some blood coming out? I thought I wouldn't have that problem in the breast muscle. I am pretty sure the location was right. Just wondering how to properly inject and if I could have done any damage? Also, I have read dosage suggestions from 25mg to 100mg for a standard hen. The higher dosages seem to be mostly coming from people in the UK using Tylan 200. I want to knock this Coryza out and would like to stick to only the Tylan 50 for as short as possible. Any suggestions would be appreciated. Also I have read that in the UK Tylan is approved to read zero day withdrawal. That is based on the powder that is added to water. If I did the math right the dosing on that would add up to 100mg -400mg per day for a 2kg/ 4.4lb hen. That sound like a lot more than the injections I am doing but I realize it takes more orally. It would be nice to not have to wait 2 - 4 weeks to use the eggs after we stop the antibiotic. Anyone know more about this?