Batryl is enrofloxacine antibiotic but in this situation the better antibiotic is amoxicilian or peniciline or gentamicin! Please ask the vet, good luck!
Doxycycline capsules from human pharmacy 1 g / liter of water combined with Tylosin.injection solution 1 ml / 1 liter of water for 10 days!.doxy+tylan good combinations for respiratory problems in chickens!!!
yogurt or kefir is necessarily after this treatment to restore intestinal flora
Ivomec Injection for Cattle,sheep and Swine give 0.5 ml if you have large birds or 0.2 ml for bantams give the shot - subcutaneous in the back of a neck,beast treatment for mites!!!!!