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Can mice eat lettuce?

Caution for mice

Best avoided. The RSPCA advises not feeding lettuce to mice because it can give them diarrhoea. Source: RSPCA

Conditions

When it is a problem

  • The RSPCA says lettuce can give mice diarrhoea. Source: RSPCA

Signs to watch for

  • It can cause diarrhoea. Source: RSPCA

Sources

  1. RSPCA: What to feed pet mice (opens in a new tab)

    “Don't feed them lettuce, as this can cause them to have diarrhoea”

    Read on 10 October 2026

  2. Merck Veterinary Manual: Providing a Home for Mice (opens in a new tab)

    “Pelleted diets formulated for pet mice should be supplemented with small amounts of fresh vegetables and occasional sunflower seeds and fruit as treats.”

    Read on 10 October 2026

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