Pre-twilight in Syrians?

[HamsterLad]

I've noticed over the last few months or so, Bianca, is sleeping more than usual and we don't really see each other as much. No health concerns, no nothing. All is good on that front. I wouldn't have said she was a lazy hamster since I don't believe rodents in general are even capable of laziness unlike other animals. She is coming up to twelve months now and I was wondering whether or not pre-twilight was a thing. My youngest hamster, Scott, is 6 months and he has been up since roughly 8:30 this evening while, Bianca, is still fast asleep.