Duphamox LA Dosage and administration Shake well before use. Cattle, sheep and pigs: By intramuscular injection only. Dogs and cats: By subcutaneous or intramuscular injection. Massage the site after injection. The recommended dosage rate is 15 mg per kg bodyweight equivalent to 1ml per 10kg bodyweight (repeat if necessary after 48 hours). The suggested dosage rates are Cattle 450 kg 45.0 ml Sheep  65 kg  6.5 ml Pigs 150 kg 15.0 ml Dogs  20 kg  2.0 ml Cats   5 kg  0.5 ml If dose volume exceeds 20 ml, the dose should be divided and injected into 2 sites. Normal aseptic precautions should be observed. Use a dry syringe for extraction of suspension to avoid hydrolysis of amoxicillin. An appropriately graduated syringe must be used to allow accurate administration of the required dose volume. This is particularly important when injecting small volumes.