Different textures in bark, paper bags or burlap bags provide enrichment. Food textures can also be varied as can the temperature of the food. We generally thaw our meat and chicken for the animals, but occasionally feed treats slightly frozen. We fill pinecones with meat for wolves and peanut butter & honey for the bears.
Human touch, grooming, scratching or rubbing are additional ways to enrich the animals life in this form. It also allows you to check the animal for its coat condition, weight loss, parasites, tumors, cuts or injuries.