There are different words in Portuguese to refer to this bird. The hen is "galinha", the rooter is "galo" and the baby bird is pinto. Also we say "frango" to the chicken that we buy in the supermarket. This bird is usually raised in big farms.
The hen sounds like "co-co-có", the rooster sings "cocoricó" and the little chichen sounds "piu-piu". :D