DENAGARD contains 12.5 % Tiamulin Hydrogen Fumarate as the active ingredient. DENAGARD has a long history of excellent activity against the Respiratory Organism that causes CRD in Chickens, Mycoplasma gallisepticum. It also has excellent activity against MS or Mycoplasma synoviae as well.
In addition, you can use Denagard as a preventative treatment and give to the entire flock every four to 6 weeks, on average, in their drinking water, for about seven days at a time.
There is no withdrawal for eggs with Denagard, so you can continue to consume eggs. It IS an antibiotic, but resistance does not develop.
Resistance DOES develop withTylan and Baytril; furthermore, Baytril is not approved for use in poultry, although it is still a very good antibiotic for certain conditions in poultry.