I'm guessing mine sleep most of the time by the way their toys are left. I usually give a little treat when I leave so they know that is a signal for them to each go into their individual ex-pens. No wimpering. But when I get home there is a major ruckus. Pity dh if he's in bed already.

Joanne
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Joanne

Eli

Chipper

Eva

Snowboy

Rosie(R.I.P. 1996-July 29, 2013)

Cocoa(R.I.P 1998-April 26, 2012):