Furrytoonosaurus wrote: Didn't they come from a another and how did they know about The Chipmunks and how the human life is if they have also growned up in a another forest?
It's hard for me to understand your question from the way it's phrased. As for that last part, it's never said in the films that they came from another forest, despite the fact that Brittany says in Chipwrecked "We used to be used to living in the wild." Disregarding any speculation that they were aluding to an origin story much like that of their 80's counterparts, the most we were given from The Squeakuel was that they grew up in a small town with a population of only 300. However, the name of the town and its location in the world is never stated.