Hi guys, So I rescued a pregnant wood mouse from a cat. She had

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Hi guys,
So I rescued a pregnant wood mouse from a cat.
She had the babies fine and they are now around two weeks old (eyes open/fur/ mobile). She made her nest in a little plastic dome I had for my hamsters. The problem is I cant check the health or numbers of the babies since the mother is wild. So ive left them alone so far, I'm wondering if there is anyway I can get her out of the nest without causing too much stress (and abandoning the babies). They are getting into flea stage from the glimpses of them I can see. Is it ok the lift the plastic dome off and just nab her with the fish net? When she is returned will she abandon the babies?
ps/ gonna try and rehab them back into the woods when they are older but there are tons of foxes about so I want them to be a bit older.

pic related right after I got her