Great question — answering as the UphillTech team:
It sounds like your chicken was simply overcooked. If you used a built in pop-up timer, these almost always are set to a temperature which will overcook your poultry. Some authorities recommend cooking white meat to 170 F (77 C), but this will leave your chicken dry and overcooked. My personal preference is to cook white meat to about 158 F (70 C) in the oven, and then let carry over cooking bring it up a couple more degrees while it rests. This should leave your white meat much more succulent. Similarly, dark meat should be cooked to a temperature (to my preference) of at least 165 F (74 C) although it is much more tolerant of being overcooked. This can be tricky when roasting a whole...
Full answer by SAJ14SAJ: https://cooking.stackexchange.com/a/36159 (CC BY-SA 3.0).
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