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Are sawdust and wood shavings toxic to mice?

Toxic for mice

Avoid sawdust and wood shavings for mice. PDSA and the RSPCA say they can cause health and breathing problems, and Merck says shavings can block the gut if eaten. Source: PDSA, RSPCA, Merck Veterinary Manual

Conditions

  • Merck recommends paper-based bedding, which is not dusty and is digestible if eaten. Source: Merck Veterinary Manual

Risks and signs

Sources

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

    “Wood shavings are less ideal, because they can cause gastrointestinal tract obstruction if eaten”

    Read on 10 October 2026

  2. PDSA: Mice as pets (opens in a new tab)

    “Avoid wood shavings or sawdust as they can cause breathing problems.”

    Read on 10 October 2026

  3. RSPCA: Creating a good home for mice (opens in a new tab)

    “Don't use fine sawdust, wood shavings or aspen bedding – they can cause health problems – or any fragrant and coloured material.”

    Read on 10 October 2026

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

    “Commercially available paper-based bedding is the best choice for bedding, as it is not dusty and is digestible if eaten.”

    Read on 10 October 2026

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