I just read your post, "Aureomycin crumbles for foot infection." Poultry foot infections are usually caused by staph infections if it's bumblefoot. Surgery to remove the infection, or use of Tricide Neo will eventually clear the infection up over time. If it's not bumblefoot, penicillin G procaine injections is the drug of choice for foot or leg infections. Gout can also cause foot swelling as well as in joints, mostly in older birds. A change in diet will prevent gout.
Aureomycin soluable powder and/or aureomycin crumbles wouldnt be effective for a bacterial infection in the foot. The following is what both products treat: Air-sac infection, MG, E-Coli, fowl cholera, bacterial pneumonia, bacterial enteritis, shipping fever.
I've used aureomycin soluable powder to treat E Coli but it was too late, the bacteria had overwhelmed my rooster.