Separately, all Critter Powers are Species Abilities. Magic 1 does get the Critter every Power, if a the Magic Attribute drops under 1, the Critter will count as mundane (non-magical) and only natural mundane powers survive that, all other magical powers are lost.
But there is another interesting fact, if a Sapient Critter get the Magician or Mystic Adept Quality, and bound an Power Focus, it will work for all Tests with Magic involved (including its Critter Powers).