I have khakis and although they have their own place to sleep at night they are with the chickens throughout the day and have done fine. I have even found confused ducks sleeping on the chicken coop floor. Yours shoudl be fine, just keep an eye on them.
As for food mine get the same as the chickens, layer pellets and cracked corn and they occasionally eat the scratch that I throw down for the chickens. They have done just fine on it. Good luck with the khakis! although they are not very friendly (at least mine arnt) they are great egg producers and funny to watch!