what is the white one doing all the jumping? it looks ike a dilute husky robo to me, in with winter whites, but i can't really see it. it could be a pearl i guess.
one of my robos jumps like that, fasters and more often though. It tires me watching. I think she just wants attention though as when I put my hand in she jumps straight onto that and calms down for a bit and then shes off again.
I thought winter whites until I noticed the two mottled hamsters by the wheel at the beginning of the clip.
The jumping one appears to have some sort of a neurological problem.
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I think they are winter whites too with some marbled ones. There are a lot in that cage. Probably inbred and the little one at the back looks to have the 'flipping' neurological disorder. Poor little mite.