Mice turn cannibalistic when they are stressed. This is not normal behavior for mice, though maternal cannibalism of babies is much more common than other forms. When babies are cannibalized, they are usually killed by adults beforehand. Cannibalism of dead adults occurs under conditions of starvation and overcrowding.Know More
Mice are noted to be an infanticidal species. The killing and eating of pups by the mother is thought to be a defense mechanism, as it is particularly seen in mice bred for strong nest-defending behavior. Some lines of mice are more likely to kill pups than others. Infanticide is often associated with human handling, so sometimes mothers are anesthetized to prevent it.
Cannibalism under other conditions is considered to be unusual. Mice have been observed turning cannibalistic to survive cold winters, when dwindling supplies of food cannot support the animals' population. For example, dead mice caught in traps may become food to survivors. Under ordinary conditions, mice prefer to eat sweet and carbohydrate-rich foods rather than flesh.Learn more about Rodents
There are many commercial rodent foods that are available for pet mice; these foods come in block or pellet form. The food should be made up of at least 16 percent protein and 18 percent fiber, and it must not have more than 4 percent of fat.Full Answer >
Rats eat nearly everything, including mice. The act of rats killing and eating mice is called muricide. This is a stereotyped behavior among rats. Muricide occurs due to hunger and environmental conditions, but mouse-killing is also affected by neurotransmitter signals in a rat's brain.Full Answer >
According to the Pennsylvania Game Commission, mice in the wild sometimes eat spiders. They are omnivores, eating both plants and animals. However, mice prefer various types of vegetation.Full Answer >
Field mice are herbivores that prefer to eat any vegetables, seeds or fruits that are in season. If their preferred foods are not available, they may also eat tree bark, roots or, if they live near a farm, whatever crops the farmer happens to be growing.Full Answer >