How does a mouse kill her babies?

A mother mouse may inadvertently harm her babies due to stress or environmental factors, such as feeling threatened or disturbed. If she perceives her nest as unsafe, she might abandon or even harm her young to protect herself. Additionally, in cases of overcrowding or inadequate resources, she may cull weaker offspring to ensure the survival of the stronger ones. Such behaviors are instinctual and driven by survival instincts.