Does your seed store have turkey starter? I had to look to get non-medicated though its hard to find even here where I have a great selection of foods. I feed the Aslin Finch brand. Purina makes medicated. At 8-10 weeks you can lower the protien and switch to grower about 20-22% protien, I am using Purina grower I just switched.
If you can't find turkey at all, look for game bird feed as a starter, for starter you want 27% protien, and can switch to 20-22 % as grower.
Use starter till 8 min to 10 weeks, then switch to grower. Young turkeys need high protien for leg development early on.