Dog-cat make brain strong in old times. Study say.

Big brain hurt no good! Old people brain forget. But dog, cat make brain strong! Smart people find this. Dog, cat make old people brain not forget. Play with dog, cat, good for head. Old people play fetch, pet furry friend, brain happy. No forget where food is, or how get home. Dog, cat good for head, make strong like mammoth tusk. Smart people say more play with dog, cat, better brain get. Oog, mammoth hunter with keen eye: "Me see grandpa play with wolf pup. Grandpa remember Oog's name now!" Boog, fire keeper with warm heart: "Me pet saber cat, brain feel strong. Remember where put flint!" Chieftain Grognak the Wise, leader of Cave Rock Clan: "Dog, cat good for tribe. Make old people brain strong, tribe strong." Story by Rok from Caveman Talk Fire, on the scene.