questions: asking that his 50 no.s of 1-month-old ducks  suffering from biting each other. 
 answers:  tr.: 1. common salt with feed, 2. tetracyclin powder 100 gm @ 2 gm in 1 lit. water daily for 7 days, 3. vimeral 60 ml @ 10 ml daily, 4. min. mix. 1 kg @ 30 gm daily.