I have predator problems, too, with the turkey eggs being eaten. Consider collecting fresh eggs and replacing them as they are collected with dummy eggs. Once the hen goes broody a cage can be placed over the nest or the nest can be moved to a cage where it will be safe. Turkey hens seem to accept the nest being moved as long as they are unable to return to the original nest site. When I find a nest out in the wood lot or other dangerous area I place the nest in a low plastic tub (drill holes in the bottom) of the appropriate size and leave it where the nest was. Once the hen starts brooding it is a simple matter to lift tub, nest, and hen and move her to safe quarters. My turkeys are tame and used to being handled.