Depends on the species of the mumma / baby used to size the hamsters.

Amoeba: I'm taking the 5 babies. It'll be harder but I still like my chances.

Oak Tree: I think my only chance is to take the babies, Though I'd be tempted to choose momma just to marvel at such a creature.

Elephant: No good options here, in a fair fight I'd lose either match. I think my only shot is to choose the momma hamster and try to win through trickery.

Hummingbird: I would lose via forfeit. They're too cute I can't do it.