There are a lot of great resources on having turkeys as a pet, as opposed to breeding or raising for food. The suggestions for high protein diets are for meat birds and not meant for longevity of life, but for building muscle fast. This is info from great turkey person on this site. Use an 18-20% all flock feed for longevity. Get a small breed, heritage like a royal palm. Do not great a broad breasted, it is sad, they can’t move around well, don’t live as long. I have a 12 ft by 14 ft stall with attached 10 ft by 10 ft run , it works great for a pet. Since yours will only sleep in run it is fine. They will perch, make perches with two by fours for them high up. They like them to be at least 3-4 ft high. Things you will struggle with- they do not come in at night like chickens. So free ranging is great for them but it is a pain to round them up at night to bring them in. I ended up with mine because his hens got eaten because the owner couldn’t get them in at night and a fox ate them. They were in fenced enclosure with trees. They aren’t fast. They will stay out in pouring rain, sleet and snow. previous owner used to spend all kinds of time trying to get them in and decided turkeys weren’t for her. I am already struggling with decision to take him because I don’t want aggression towards my hens, but he needs flock mates. I’m worried adding turkey hens who don’t know chickens or him will disrupt my chickens. Right now he seems happy and calm, but will have to watch for mating attempts and aggression. I’ve read horror stories. I made sure to add a lot of chicken hiding places.