We had to walk him on a leash regularly because it was the only way to get him to walk. Turkey canes did not work well for him. We have 100 acres of wooded area and farmed land, however, only a few acres of that they use (which is great for me). Since he could see the other tom near his hens, he was always concerned about them and would immediately just try to go right back to them. Even their night time lodging (between 10PM-8AM) is ten (or more) square feet per bird, as recommended by the 4-H handbooks. We leashed trained him from a few of our judge friends recommending us to walk him for him to lose some weight.
So, if I'm understanding you, if left to free range he did not walk around at all? Did he just sit in front of a feeder? I know some chooks will do that but I haven't had that much experience with purebred turkeys so don't know if meat turkeys do the same.
One other way of interpreting what you're saying there is that you caged him or leashed him to stop him going back to the other turkeys? I would guess due to tom-on-tom aggression?
They are given free range over 100 acres of wooded and farm land. Their mixed feed that I feed them is one 50lbs bag of DuMor Gamebird Grower, one 50lbs bag of Black Oil Sunflower seeds, one 50lbs bag of whole oats, one 50lbs of whole corn, one 40lbs bag of alfalfa pellets, soybean meal (I mix this into the feed to make sure the protein is correct), then the tiniest bit of crushed oyster shells. The animals are given grains at 8AM, then at about 4PM, they are given their mixed feeds until they are locked up for the night (giving them six hours to consume all of their mixed feed that they want).
Sounds like a pretty good diet, reckon that won't be the cause then. The turkeys with heart/circulation issues I've known, as with the chooks with heart/circulation issues, were all raised on the cheapest crumbles/mashes/pellets, not on Gamebird growers and a mixed diet like you describe which seems to be one of the better options out there if you can't get them a complete natural diet which is beyond most people's means.
His were most likely genetics. I bought him from a man who bought him from a feather farm for $10. I believe the guy said that the farmer had over 200 Royal Palms at one point, then his barn burnt down and that is how he got him. I don't believe that a feather farm would have raised birds for the healthiest of genetics. Gerald has always been overweight, even when he was with the man I bought him from. Maybe it was an obesity gene possibly?
Yeah, sounds like it might be some endocrine imbalance quite possibly likely due to genetics. I've not heard of obesity issues with non-meat-breed turkeys. Perhaps he's not very purebred despite the phenotype and has some heftier breed mixed in somewhere.
Anyway, best wishes.