anyone use oxytetracycline injections on their chickens? I have some of the Terra-Vet 200 from Tractor Supply to treat respiratory infection in my chicks. I have seen dosages all over the place, especially on this site. The PoultryDVM site states dose is 5mg/kg daily, which requires dilution to even get a dose small enough for a 230 gm chick. Other sites recommend up to 50mg/kg. Wondering why there is such a huge discrepancy. How have you have dosed successfully? Thanks