thank-you all that anwered my question. my first grey who i think is a male was bought at a pet shop when he was 8 months old,and is now 7yrs old and a biter. the other one was found in the yard, about a year ago, looks like a female and is very sweet and tame no biting, i have no idea on the age of that one, but i'm reading up on everything i can to learn more on these birds.right now i have they're cages across from each other, they talk the each other back and forth.