A few treats arranged in a Kong® for dogs or a Pipolino® for cats, it works the brain! Your companion will rack their brains to obtain them and will quickly become more crafty each time the experience is repeated. Be careful, however, not to play too often or to make the game last too long at the risk of it becoming torture, especially if he is hungry!
You can also make these small toys yourself: in a shoebox with a pierced lid, your cat will have to put its paw inside to remove the kibble. For dogs, remove the cap from a small plastic bottle and place treats inside: he'll have to spill the bottle to get them.
5- A little climbing?