Hello!
I'm not the biggest fan of this bc it contains allergens - so, while trying to give a beautiful coat, you could be doing just the oppositve. It contains flax, which is a grain derivative - many dogs cannot convert it, so not only do they get no fatty acids from it, but it also then makes them itchy. Also contains soy, wheatgerm etcetera - so just beware.
If you're looking for a coat booster (fatty acids) I'd recommend a pure fish oil w/ vitamin E like Eicosaderm from
www.vetamerica.com.