I've been raising budgies for a long time now. But recently, I've been taking care of one of my friends budgies and they chirp a lot more than mine do. Mine rarely chirp.. Why is it this way? They get better food, more light, they have a bigger cage and more toys. Whats the problem? Then again, my budgies are pretty old and hers are young.. I'm very confused and I just want them to be happy!