There are a number of ways to fatten up a turkey. The best way is to feed it and keep it happy.
Milk
Sweet feed, sweet feed, sweet feed
Feed it high protein feed.
feed it a lot of food
Grain is the most common feed you'd use to fatten up a beef bull for the freezer.
the best food to feed a chinchilla is pellets and fresh hay and of coarse you have to have water
Because it contains high energy and high protein making it an ideal feed to fatten up livestock prior to slaughter.
Feed grains are used to feed animals. Typically cattle, but also horses and other livestock. They are meant mainly to give energy and fatten the animal up.
No!
Yes you can feed a cow fruit or peelings. In Yuma AZ. They fatten up cattle with dump truck loads of cantaloupe.
They are herbivores so feed them plants that are edible but DO NOT FEED CHINCHIL