Doxycycline HCl + Neomycin Sulphate (50g) is a dual-antibiotic formulation that combines systemic and enteric antimicrobial action for comprehensive treatment of bacterial infections in livestock and poultry. Doxycycline works systemically against respiratory pathogens, while neomycin targets enteric bacteria like E. coli and Salmonella. This water-soluble powder effectively treats mixed infections including colibacillosis, enteritis, and respiratory disease complexes. The synergistic combination reduces bacterial resistance development through different mechanisms of action. The 100g package provides a convenient, stable formulation for administration via drinking water. Veterinary prescription required with appropriate withdrawal periods for food-producing animals.