Aggression
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Allergies
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Barbering
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Bathing

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Bedding

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Birth
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Biting
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Molting
Every few months gerbils grow a new coat. When gerbils grow a new coat sometimes you can see the molt line. Basically the molt line is the progress of new fur growin in. Some colors like nutmeg this is super easy to see. Other colors like black may be hard to see the moult line.
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Upper Respiratory Infection
Gerbils may wheeze, cough, or click while breathing
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