Question: query regarding duckery 
Answer:  the shed should be well construct preferably over the pond ,maintaining a distance from one bank of the pond, depending upon the direction of sunlight, for easy management. the excreta of duck regullarly fall over the pond immediately after defication which act as diet for fish on regular basis , thus reducing the labour cost , the feed for the fish can be tied with the piller of the shed which is in the midst of water of the pond , the duck should be vaccinate at proper age with duck plague & duck viral hepatitis vaccine .