Leave it in a separate feeder so the females all was have access to it, its fine for the males to eat a bit of it mine ignore it completely, they may have a bit of a taste bit it won’t hurt them, the females will eat it when they need it. If you get oyster shell meant for chickens it will need...
You can do that, I personally would just feed the turkey starter (you could get which ever is cheapest) to all ages because I don’t think the small protein difference will change much, but it is a lot easier to just have one type of feed rather then two different feeds.
The mash should be fine...
I don’t know about feed you can get, but I feed the same feed to my chicks and adults (highest protein I can find is 21%). I would switch them to lower protein feed at 6 weeks or when they start laying if I could find higher protein feed.
I can’t find the IFA turkey feed, do you know the...