Gracie, my 8 year old Timneh Grey, always tells me when it's time for her to go to bed - it makes no difference whether it's EST or DST. She never changes her bedtime (5:00 p.m.) - it's almost like she watches the clock not when the sun sets or rises. She has me confused - do you think she determines when it's bedtime by my chiming clock or the program she hears on TV or some other sign.