>>5011873Ducks need niacin over other poultry. Easy to provide. Peas. Just give him peas once in a while once he is a little bigger.
He is always going to be lonely. You should really consider trying to find him a home with other ducks or consider getting more ducks and slowly introducing them in a controlled safe way (through a fence or cage).
Depending on age and imprinting, he is going to be really fucking annoying and high pitched and loud. He will be frustrating because ducks don't give a fuck about your sleep cycles or schedule. They have their own.
Ducks love routine and if you ever get him used to doing something he will expect it and get frustrated if you break routine.
I really do strongly encourage you to try to find him a safe home, you will never be able to fulfill his flock need and social requirements.