Sally, unless your chicken is specifically labeled you can safely bet it's full of antibiotics and growth hormones. I'd write to the company and ask them for their source for the chicken they use.

I remember the Tyson chicken breasts in the meat department being HUGE. And a golden yellow color. Typical for chickens being fed a mostly (GMO) corn diet with added growth hormones/antibiotics. I can only imagine what that combo does to our human bodies.