The most notable characteristic of the Ruffed Grouse isn't how they looks -- it's how they sound. In the spring and a little in the fall, the male ruffed grouse beats the air with his wings to make a loud drumming sound.
expired test strips are NOT reliable. most strips have an expiry date over 2 years from the date of manufacture...... that's a long time for them to be 'sitting around'. as for e-bay........
Most of the whitening products we use in our office have a shelf life of 18 months. Once the whitening strips expire, they will not cause any harm to your teeth, but their whitening effectiveness may be reduced or even completely eliminated. For best results, use your whitening strips BEFORE they expire.