I just adopted out 2 wild turkey poults to one of my broodies (she now thinks she is super broody...having produced chicks after setting for just 12 hours). They are with a 3rd chick that the feed store said was a domestic white turkey...but turkeys don't have combs, still I couldn't leave the little bugger there all by himself. Having a free range hen raise 2 poults and 1 chick creates some interesting contrast in their behavioral differences.
As for mine, they all eat the same thing, generous amounts of forage supplemented by whatever food is out near the coop that day (usually starter/grower crumbles, layer crumbles and a scratch mix). I've found the poults to be considerably more clumsy and slower on 'getting with the routine' of in/out of the coop/nest box in the am/pm...but after a week they've got it all down (the chick had it in 2 days). They also roam much farther from the hen than the chick, and spend much less time taking siestas in the warmth of her feathers. Oh yeah, and they move MUCH slower.
Now mind you, these are just some poults that were at the feed store, I have no background on their quality and just wanted to give them a good environment for their growth....besides, I had a broody and don't need any more chickens right now.