Going to Try a Few

For meat?

If you can't buy waterfowl feed, I'd put them on turkey or game bird starter for the first 2 weeks then onto a flock grower type. You have to add niacin if you are feeding food made for chickens. Niacin is usually already in turkey and game bird feed.

It's my understanding that when they are raised for meat, they are kept under lights 24 hours per day. If you want them up and done and gone fast, you could probably keep them on turkey feed, because you don't worry about angel wing if you will butcher them.

My experience with commercially raised duck is that it is far too fatty. You will probably get better meat if you don't push the growth so hard, but I don't think care and feeding would be too much different than raising broilers.

They do well free ranging if you don't have predators. Ducks tend to stick together and they are easy to herd. They are less messy if they have a large area.

Ducks are rather disease-free. Not like chickens. You just have to be aware of their niacin requirements.

For table ducks:
0-2 weeks 18-20% protein, free choice
2-7 weeks 16-18% protein free choice

My table ducks get raised with the show ducks and get the same care and the same diet, which means they don't get free choice feed after 4 weeks. They get fed 3 times a day. After 7 weeks 15-16% protein.