How heavy was the object that fell on him and is there an open wound. did it pin him or just hit him on the head. He may need a few days to recover then again he could have a brain injury hard for those of us not able to see him which it maybe. I'd go with my gut if you don't see any improvement soon and he isn't eating or drinking then i'd take him to the vet, you will be the one to make the decision on whether to put him down or not. The vet can't do that with out your okay.
When you look at his eyes do they look normal compared to the other ducks? I think you can tell alot about a head injury by the eyes. That's alot of weight to fall onto a duck. How does he seem this morning? You can put some ACV into his drinking water to help with the cracked bill. It works ads an antibacterial and also is a good tonic. 1-2 Tab to 1 gal of water. I hope your seeing improvement today.
He could dif have a neck or back injury and that will take time to heal and hopefully it will. I'd make sure he gets plenty of rest but has pool therapy to keep his muscles strong. If you think a vet could help then by all means take him, they will most likely want to do xrays. also some poultry vitamins in his water. Thanks for update.
What's keeping him from eating do you think pain? Thanks for update sure hope he heals up fine. You could try making him some fermented feed, it's moist and maybe easier to eat. take a cup of feed put 1-2 tab of ACV and hot water mixed together pour over the feed let it sit long enough for the water to be absorbed even over night the longer the better as far as fermenting but your just trying to get him to eat, you can even try it soupy and see if he can eat it better that way. Try a small amount to see if he'll eat it my flock love ff.
