Do you get down on the floor ever and play with her? I don't know...Kacee is 4 months old and plays really hard sometimes and at least once a day, usually in the cool of the evening, she will go outside and run for awhile (I'd swear at least 80 mph
). She played with Cosmo this evening and they played I think it was like 2-1/2 hours rolling and tumbling and having a big time. Cosmo is 5 months old.