Turkeys can eat pumpkins. They can eat everything inside of pumpkins including the seeds, flesh, and other slimy parts.
Pumpkin seeds contain about 19% protein. You can allow your turkeys to eat the seeds of your pumpkins as an excellent source of protein.
Aside from the seeds, pumpkins can eat everything inside the pumpkin. This means that when carving your pumpkins, you do not have to throw anything away if you have turkeys.
Remember that turkeys need a lot of proteins and pumpkins cannot provide every nutrient that your turkeys need. Instead of giving pumpkins to turkeys as their regular diet, give them as treats.