Add any plain Greek Yogurt to the lick mat. Make sure the yogurt does not have any added sweeteners or other ingredients.
(Every pet is different so use as much or as little of each ingredient as you feel appropriate. Consult your vet with further questions about nutrition)
Put your enrichment toy in the freezer for a few hours to increase the longevity of the food.
Always supervise your pet with enrichment toys, as they can be chewed up.
When just starting out, use foods you already feed your dog and add new ones slowly over time.