I have a whole acre full of a mixed flock of chickens, ducks, geese, guinea fowl, and turkeys. The turkeys do fine with the ducks in my opinion, I have had no issues. I keep a pond and a pool for my ducks and geese they love it. I'd say they could eat just about anything really, mine just eat whatever fruit and veggie scraps I give them, including grass, mixed seeds, cracked corn, and other feed. They also love a tasty treat of dried mealworms, they'll even eat live worms and other bugs. If I can, I recommend not clipping any of their wings, yea they can fly a tad but if you raise em right they'll stay, I have never had any of my birds leave. I also kindly recommend you keep them as pets and consider not eating them, Turkeys and Ducks have a lot of love to give, trust me I have some so tame you can hold them and so forth.