Our sweet dog Nico, a 13 year old 10 pound toy poodle, was diagnosed with a collapsed trachea in September 2016 and as a result had quite a bit of difficulty with his breathing. Our Veterinarian prescribed an inhaler and recommended that we try the AeroDawg chamber to administer the medicine. We used the AeroDawg chamber for months and noticed a dramatic improvement in Nico. The chamber was very easy to use and Nico adjusted to it nicely. Thank you very much for this wonderful product which we believe increased Nico’s quality of life and extended his life span.