Duphacort Q Dosage and administration By intravenous or intramuscular injection. Normal aseptic precautions should be observed. Dosage: Horses and cattle: 1 ml per 25 kg bodyweight Dogs and cats: 1 ml per 10 kg bodyweight e.g.     Horses 500 kg - 20 ml Cattle 400 kg - 16 ml Dogs  10 kg - 1 ml Cats  5 kg - 0.5 ml