Hello andrea70,
Over two years ago, I had the same thing happen with three pullets. They got sick with an upper respiratory: nasal discharge, chest rattling etc. My Vet prescribed Enrofloxicin for them. They seemed to get better. But, then became sicker after 10 days!
My research led my to Denagard, a liquid which is put in the water. It is used for swine dysentery and respiratory illness. The poster described her success using the product with her chickens. So, I thought why not give it a try. They will die if I don't do something. Antibiotics don't always work. And if they fail on the first try, they'll fail the second time. On top of that, you will create antibiotic resistant bacteria, and further destroy the hens good intestinal bacteria.
I purchased the Denagard online at
Amazon. It came in 3 days, I gave it to the chickens and by the 2nd day there was improvement. By day 3, the sickest pullet had drier sneeze, no nostril discharge, no chest rattle! It cleared the infection completely in 5 days. But I continued the recommended 10 day treatment.
A fresh batch must be made each day and the apple juice concentrate added because of the bad taste. After treatment as with antibiotic treatment, follow with probiotics.
If you would like my dosage instructions for Denagard, just let me know. I check my Alerts and Inbox daily here on BYC.
God Bless!