I started my pony's 'loading dose' course of Airway Plus Liquid about three weeks ago. She was coughing a lot, due to the very dry weather, dusty paddock, and hay which is clean but of course is very dry. She is fussy about wetted hay, so first I tried the Airway Plus and it seemed to work very quickly indeed, and now she is cough free, amazing! ordering my maintenance bottle soon.