I live in a pretty urban area, and there was a story on the news the other day about a Coyote chasing a young child off the walk-way in one of the neighbourhoods and biting her...I always worry about Charlee...I'm hoping to move this summer to a more rural neighbourhood and have plans to purchase  one of these enclosures for both the safety of my small dog,and cat..
  Home of Habitat Haven, Outdoor Cat House : Cat & Pet Enclosures  I've seen them in person, and they are very sturdy, and with the roof, should keep the little ones safe from hawks as well!