is he still choking now? can he drink his water at all by himself? if he can get his water thats the best thing for him..but dont force water down his throat..it will go into his lungs...
it also helps to slightly moisten their food during the first week of life. You have to change it abut ever 2-3 hours so it doesn't go bad or moldy. I had duckling choke before too, and this seemed to help alot.