KONG Refillable Chew for Senior Dogs Dogs also need mental stimulation in addition to physical and for this you must use toys that are suitable. Normally pets do not develop their cognitive abilities enough, that can have consequences on their mood. This can lead to behavior problems . To avoid that and to get him to find the perfect balance between mind and body, you must offer him interactive toys. You will also improve the bond with your furry friend while having fun and learning. The KONG Senior is made with KONG's soft yet durable Senior formula for older dogs. Fill with Easy Treat or Snacks to encourage your dog to chew a perfect toy for aging teeth and jaws. Made from our specially formulated KONG Senior rubber Perfect for filling with KONG Easy Treat and Snacks Restimulates play and exercise Recommended worldwide by veterinarians, trainers and dog lovers Made in the USA