Following the old thread here we decided to give our 8 wk old Americana/EE chick the Tylan but reduced dose to 1/2cc due to size and shot her in the thigh because her breast is tiny, crop was full and we were uncertain. Hope this works! Thoughts or additional advice is welcome. We also decided to put duramycin 10 in the water of all the chicks as preventative. We really don't like using pharmaceuticals but we also don't want to loose them and it will all be out of their little bodies way b4 they lay their first eggs. We did 400 mg of the duramycin to 1gal.