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The guinea pig is bigger and has a longer life span (4-5 years). They also have a larger diet. They will eat any type of vegatable. A gerbil is small and has a life span from 2-3 years, sometimes 4 years. Gerbils do not like all vegatables. I wwould call them picky on their food. I know this because I have had 8 gerbils and 1 guinea pig that is probably like 5 years. Still alive. But you can tell its old. It's had 2 strokes! But it got better on it's own.

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16y ago

What else can I help you with?