Edited by Enslaved-by-Ducks - 5/8/11 at 6:39pm
I have had ducks for 5 years now with chickens. They all sleep in the same pen, play in the same run and eat the same food. I have some of the healthiest ducks around.
I don't know where you get your info but it's false.
However, I buy " All Purpose " Back Yard Flock " feed. It's made for all fowl type. Ducks, chickens, Turkeys, Quail, ect...you can buy just plain chicken food that has 16, 18 % protein and is fine for just chickens but Ducks can also eat this food. I have had to feed them all just chicken food when the store ran out of what I normally buy. No dead Ducks yet.
I wouldn't feed them just chicken food for very long if possible. I also give my ducks plenty of lettuce scraps, peas, corn, fresh cut grass.....and they free range during the day so they get plenty of bugs to eat...hope this helps. But no, you wont hurt your ducks by giving them chicken food.