Since there's such a spectrum with allergies, it has to be a consideration when you start.
A real solution– one that gets to the root of the issue takes time.
In those mild cases, dogs who are just experiencing the hyper-reaction and its symptoms for the first time may recover fairly quickly. Those that are severe, dogs who have been allergic for most of their years, will need a lot more time on herbs and cooling foods, maybe even pharmaceuticals.
Give it around 2-3 months before expecting to see results or changes. The herbs in Clear AllerQi will build in the system, helping to cool the skin while working to balance the body's overreaction. Most use the allergy regimen for more than a year.