If you need to drown in food Blue Peafowl (aka. peacock/peahen) is where it's at. Allow me to demonstrate:
Turkeys lay 12 eggs on average and provide 19 edible items and grow in 2 years. Blue Peafowl lay 7 eggs a year on average, yield 16 edible items, and mature in 1 year. Using a starting population of 1 female and one male I will now demonstrate how in 2 years blue peafowl will provide far more food than turkeys. I'm assuming that animals lay eggs once a year.
One peafowl would lay 7 eggs yielding a breading-age population increase of 450% (2 grew to 9), all during 6 months. 9*450% is 40.5, so on the end of year one you would have 40.5 full grown peafowl. At one and a half years you would have 182.5 peafowl, and at two years 820.125 peafowl.
One turkey would lay 12 eggs, and at the end of year one the breading age population of turkeys would be 14, meaning the population increased by 700% over a year. So 14*7 is 98 so at the end of year two the population of turkeys would be 98.
98*19 is 1862 edible items from the turkeys at year two, 820.125*16 is 13,122 edible items from the peafowl at year two. Ergo, peafowl are always better, because they grow twice as fast as turkeys, and before anyone mentions it they are also better than geese because they lay more eggs.
However, all those animals are going to crush your FPS so I recommend that you just farm stuff. You also can not brew animals.
Also as far as war animals are concerned I say you just embark in a savage biome and capture the local wildlife.