Q:

When do baby mice open their eyes?

A:

Young mice are born blind, but they begin to open their eyes after 10 to 14 days. If their mother was exposed to insufficient lighting during pregnancy, they may remain blind even after they open their eyes.

Mice are born hairless, deaf and blind. Their blindness is due to their eyelids and eyes continuing to develop after birth. Initially, their eyelids form a single sheet of skin covering their eyes. While young mice grow hair only a few days after being born and their ears open after about a week, their eyelids do not separate until almost two weeks after being born. Blood vessels in the retina grow rapidly then regress 10 days before birth; mice whose blood vessels do not regress, due to being born premature or their mothers receiving inadequate light during pregnancy, may develop permanent eye damage or even blindness.

Learn More

Related Questions

  • Q:

    What do pet mice eat?

    A:

    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 >
    Filed Under:
  • Q:

    Where do moles live?

    A:

    Moles spend most of their lives underground. The Townsend mole, the most common species of moles in North America, prefers to live in fields, meadows, pastures and woods shaded by vegetation. The Pacific mole, also known as coast mole, inhabits habitats full of brush and dry wood.

    Full Answer >
    Filed Under:
  • Q:

    Why are red squirrels endangered?

    A:

    Red squirrels have been classified as an endangered species because their numbers have declined due to the spread of the North American grey squirrel that brings the virus parapox, which is deadly to native red squirrels, according to the Young People's Trust for the Environment. Moreover, larger grey squirrels directly compete with them for food and nesting sites.

    Full Answer >
    Filed Under:
  • Q:

    Why do rats squeak?

    A:

    Rats often squeak as a way to vocalize protest or to show stress. This is why rats often squeak when they are being petted or groomed by another rat. Small squeaks signal mild protest. Longer squeaks indicate distress, but such squeaks are usually only heard when a rat is confronted by another rat.

    Full Answer >
    Filed Under:

Explore