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The "official" answer is one year, but that's only if you feed it a poor diet of store-bought food. I fed my mouse a mixture of brown rice, oats, and vegetables (a variety, just depends on what the mouse will eat...like my mouse didn't like tomatoes but he loved spinach and other things). Sometimes I gave him cereal pieces like bran flakes or cheerios. He lived to be over two years old. It's all about diet!

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13y ago

What else can I help you with?