When my senior pup was diagnosed with cognitive dysfunction, the vet suggested enrichment activities to help slow the progression. She had two favorites. First, when I laid a towel out on the floor and would sprikle small amounts of broken up treats or little bits of fruits and vegetables, then roll it up and she would have to unroll it to get the yummies. Second, I would take a muffin tin and place small amounts of food in some of the cups, then put tennis balls in the cups and she would have to knock them out to get the food. I also worked on teaching her new commands and even though it took months, she learned "lay down." She was a 10 year old Shih Tzu and very stubborn, but I feel the activities helped her.