They give the skin the tools it needs to correct the problem. This doesn't happen over night. Often it will take 3 to 5 weeks before you outwardly notice the difference. Remember the skin is actually very thick and your therapy must start at the inner most layers. Additionally it is a good idea to choose products supplemented with zink.
Zink deficiencies can cause dry, crusty patches or worsen a pre-existing condition.
It has now been shown that many dogs need higher than normal levels of both zink and fatty acids in their diets for correct skin metabolism. The end result is always the same. When we see a scratching dog, the first thing we think of is fleas or some other external parasite. Eczema is a condition of the skin which covers many varieties of non specific dermatitis, and has hundreds of different causes, and includes all types of skin infections. It is classified into moist and dry.