i know its a bit different, but i have a duck pip backward and get stuck, he was a noisy bugger, i had to help him out and for 3 days he couldnt walk,or lift his head, so i gave him, vit water, with a teaspoon of sugar, and made him sip it, 1 an hour, no food, he couldnt eat, on day 3 i gave him mussy peas and he finally ate, during his sick time, he struggled to try and stand but couldnt, i did ducky physio, holding him up and walking him around, now, hes huge, 9 days old, and as happy as can be, 
sometimes, the struggle alone from an egg can leave them totally zapped, just keep him warm, if you can, let him ly on your chest, listening to your heart beat, it sooths them, 
keep us posted on progress
and dont give up yet