Woops! I didn't see that a dog found it ::smacks self::

Check it over good for any dog bites, hopefully the lil sweetie is ok. In that case it seems your friend saved the lil bun bun!! I agree with Zippy, contect the local SPACA or Rehabilitator, they will know what to do and be able to keep it alive and healthy and then return it to the wild.

Ash