firstly thanks for all the advice,im glad to say both ducks are still alive one is better than the other but both have improved,After much head scratching to the point of bleeding i decided they had a respiritory infection and vit b deficiancy.gave them 0.5ml of baytril mixed with 2ml of water in syringe and squirted down the neck ,i also gave tylan and vit b mixed with their drinking water. This seems to be working but time will tell but seem to be going in the wright direction will keep all updated on their progress . cheers