Mia keeps Kess active in her old age. She loves to pick a fight with Kess, usually after walks or meals. You can see her thinking about picking a fight, go on the predatory stance and then pounce on Kess, nipping her to get Kess to join in the fight. They'll chase each other, Kess will usually drop on the ground as her hind leg is not as strong and they'll roll about like sumo wrestlers. Then when both have had enough, Mia kisses Kess to make up. Aahh...sisters!
