Laboratory animals are anesthetized to avoid pain during invasive procedures. Anesthesia is necessary for these animals' welfare, but it is not always without problems: Substandard anesthesia can cause suffering, distort experimental results and force researchers to repeat tests on more animals.

Source: [Phys.org](https://phys.org/news/2026-09-animal-smallest-rodent-safe-anesthesia.html)

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