After reading this post again this morning,(12/9) it is realized that my playful kitties were responding to Lunar/Solar influences. There was a Solar conjunction to the planet Pluto,(indicating a "time of entrapreneuralship" and an inability to sleep) while the Moon was also coming into an exact aspect simultaneously. This isn't the first time I have noticed this type of bahavior. When I took Snow Cat to the vet last Monday, because he was lethargic, there was a Solar/Lunar aspect to Saturn which also affects people with lethargy, depression, and an inabiltiy to make things work. My Snow Cat was also responding to the same influences! After the positioning began to break up (Tuesday), then he started playing as normal.