debbie, i'm guessing that your thermometer may be faulty, or the tip isn't inserted into the correct place in the bird, giving a false reading. also, you may be cooking it at too high a temp, causing the outside to be over cooked before the center is done. if you slice into a cooked chicken, there should be juices, but they should run pretty clear. the joints may still be a little bit pink, which would be ok to eat, but not pink juices.
The way that you wander is the way that you choose. The day that you tarry is the day that you lose.
Sunshine or thunder, a man will always wonder where the fair wind blows.