Turkeys are a great bird to have around! There are people who keep them together with their chickens, but I would personally recommend keeping them separate. A big concern, besides the size difference, is blackhead. Blackhead is a disease that chickens can potentially carry and pass to the turkeys. Either way, you really want to have a coop of some sort for them for protection from predators. A good all-flock or gamebird feed is also a good choice for feeding. Also, be warned that heritage breeds are very good at flying. They'll roost in trees, on cars, on roofs, or anything else they can reach. Other than that, there's not a whole lot of difference is raising them!