There are heaps of Pets games like this.
Dogz & Catz have a whole franchise because the games did so well. They are up to the 5th game, since its launch in 2007. Ubisoft, Nintendo, EA Games all have a pet orientated game.
Just because the Vita gets one doesn't mean it's copying Nintendogs. There are heaps of pet games that do extremely well.
This is like saying that Nintendo used the EyeToy titles to make games like WiiPlay & WiiSports.
THE REACH!
