Food-wise they could make it, but not with all the other stronger predators around. Theyd have to be in an ecosystem without any owls, coyotes, larger dogs, wildcats, etc.. the list of better predators goes on and on.
Nostradamus wrote about this in his lost page of the Dead Sea Scrolls, which was inserted into the first copy of the book of Enoch, which was last seen with the Illuminati. the video for Poker Face tells you everything you need to know. maybe.
On the topic of fighting animals, one property I want to see made into a good third person game is Cat Shit One. Each animal type could have different special abilities and the game could be a combo of stealth and action.
The ps3 is region-free. You can play Japanese ps3 games (but not Japanese ps2 or ps1 games) on your American ps3. It's just a matter of finding a good intermediary in the country to send you the item. Yokatta or Tenso could do that.