Both First State Veterinary Supply and Jeffers have a vaccine against coryza. Peter Brown told me that EVERY bird in the flock (ages 4 weeks and above) should be vaccinated, and that the vaccine will not produce a carrier state. Birds have to be re-vaccinated a 2nd time a few weeks later (some of the coryza vaccines say 3 weeks; others say 4 weeks--read the information for the one you acquire).
Tylan 200 is WAY too strong to use on chickens--you would need to drastically dilute it--much better to get tylan 50 or tylan soluble. Baytril is best, but as was said, you need a prescription. It is available as both tablets and injection; both in several strengths. Flock-wide treatment with baytril is specifically disallowed by the FDA.
Tylan 200 is WAY too strong to use on chickens--you would need to drastically dilute it--much better to get tylan 50 or tylan soluble. Baytril is best, but as was said, you need a prescription. It is available as both tablets and injection; both in several strengths. Flock-wide treatment with baytril is specifically disallowed by the FDA.