Parrot beaks are designed for manipulating things to get food, e. cracking open nuts, de-husking seeds and foraging through substrates. Keepers place food in a tray of pebbles to encourage our macaws to use their beak to forage to get to the food.
Solving the problem. Tennis Ball Feeder for Swamp Monkeys at Saint Louis Zoo. Such a fun idea with a Great picture where you can really see how it fits together. I would put a hinge and locks at the bottom for easier cleaning however.
Sandbox or Sand pit: A sand box is a great enrichment activity for pigs. They enjoy rooting around in the soft sand. Be sure to supervise your pig to avoid eating the sand. You can hide treats like popcorn or cheerios in the sand and watch them "treasure