We keep turkeys all year round as I love them, we incubate and grow our own, etc... So most of the year they are on layers pellets.
I do buy turkey crumb for the babes. Growing turkeys need more protein then chickens so that is why. They also love love love dried mealworms! A treat and it gets them coming up to met, tame, etc.
Now, the turkey food that makes them fat for the plate is only available around October around here (and I have had the same issues trying to order online to be honest) ....But I will be totally honest...feeding them corn is cheaper and makes them just as fat! So, I won't really bother anymore with special turkey fattening food because they taste good either way.