Need help with an insect problem...

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it seems to be a new problem (I don't remember you posting about this before). You need to find out what changed and fix that.

are you growing these hamsters in your abode or you grow these for the lab (I think you work at some university).

And by the way, that big, huge mistake you made several years ago, how did you recover? was the loss really that big? did you get over it?