I've had a couple go through their moult already. Even my duck and goose have gone through it also. I guess it just depends on the bird? I know what you mean, at least its now, instead of the winter. Down here, I don't really need to worry to much about that!
Chickens (and other birds) go through a "molt" every year - they shed their current set of feathers, either gradually or all at once, depending on the chicken, and grow back new ones. These new fresh feathers help them get ready for winter.