Can a mature Pekin duck and 25 bantam hens co-exist in the same coop?

[Irishluck628]

I have 25 bantam hens that are ages 9 months-5 years. They are a mixed flock but all get a long great. I have 10 Rhode Island Reds, 8 Cochins, 3 Americauna, & 4 Plymouth rocks. My dad is moving to Florida and doesn't want to take his duck with him. I was wondering if I could house the duck with the chickens and maybe extend their run a little to accommodate for the duck pond.
Would the chickens drown in the pond?
Can the duck eat the same food as the chickens?
(The hens eat flock raiser pellets mixed with scratch feed and a little bit of layer pellets. Also some fruit and veggie leftovers)
Also how do I make this transition as stress-free as possible?
(I live over 100 miles away from my dad)

 

[Pele]

Is the duck female? If so, I don't see any problems, though it's more likely that the chickens will ostracize it. I'd put them in runs side by side so they can get used to each other through wire for a while, then combine them.

Male ducks are..... anatomically bad for hens, and may injure them while trying to mate them.