Question:  query regarding medicine & vaccine for duck 
Answer:  told him to use antibiotic powder [ lixen /enrocin/ restrict l ] 1 gm /lits of water for 3 days ,  liver tonic [hepawin / hepaways / liv 52 ]10 ml / 100  duck & b complex [groviplex , ambiplex -10 ml / 100 duck -- depending upon the type of management   vaccine for duck  -- duk plague / duck viral hepatitis [dvh} should be given in definite period of time