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Sainsbury's launches investigation as family claim to find mouse in granola

Sainsbury's is investigating a possible packaging breach after a family found a live mouse inside a sealed 1kg granola bag purchased at a London store.

  • Josie Wright, a 16-year-old student, noticed a £2.40 sealed bag of Sainsbury's Raisin, Nut & Honey granola moving after returning from a Sainsbury's Local in London, and the family filmed scratching sounds inside.
  • The Wright family believes a baby field mouse crawled into the 1kg bag before sealing during packaging, suspecting a factory or packing problem as raisins and sultanas concealed weight changes at checkout.
  • Josie Wright initially left the sealed 1kg granola bag for five minutes then heard munching and chewing, leading to her seeing half-eaten oats and visible movement inside.
  • The Wright family returned the sealed packet to the Sainsbury's store and reported the incident to customer services, while Sainsbury's said it is urgently investigating with its supplier.
  • The family urged Sainsbury's to review packing processes to prevent recurrence, noting they regularly buy the granola product and are concerned about safety risks from mouse droppings.
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Sainsbury's launches investigation as family claim to find mouse in granola

Sainsbury's has launched an investigation after a family filmed the moment they realised their granola may contain a live mouse

A family in North London got a shocking surprise when they found what appeared to be a mouse moving inside a sealed bag of granola they had bought at a local supermarket. Sixteen-year-old student Josie Wright was returning home after purchasing the product when she noticed the one-kilogram bag moving on its own. Something alive was inside the sealed bag she had bought. Although she initially ignored it, she soon heard a “chewing and scraping” no…

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Azteca Baja California broke the news in on Friday, December 5, 2025.
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