The #1 ingredient is a meat concentrate (chicken). It contains 300% more protein than your average chicken used in dog food.
Meat concetrates are made by drying and slow cooking fresh chicken. This process is called rendering and it's done to remove the water from the meat.
The result is a highly concentrated source of protein.
You can read more about this process here: https://bullymax.com/truth-meal-meal-dog-food/
For a complete list of the ingredients in Bully Max high performance dog food & their benefits, you can visit the #1 third party review site for dog food: https://www.dogfoodadvisor.com/dog-food-reviews/bully-max-dog-food/