It's a fun way to bond with your dog, teach him new behaviors, and strengthen the core - the powerhouse of your dog's body. Fun fitness training with the FitPAWS K9FITbones is also a great way to reduce stress, burn off excess calories and is a healthy 'job' for your dog.The FitPAWS Mini K9 FITbone, the FitPAWS K9FITbone and the new FitPAWS Giant K9 FITbone are ideal for training your dog on strength, endurance, proprioception, balance and flexibility.