Was the only thing that helped my girl that had a zinc deficiency. She also seemed to love the powder because she would always lick the bowl clean
I have used this product for over 10 years and it works well to help dogs under stress- especially with minor skin issues like fungal infections or summer excema. I first started using it on the advice of a Veterinary dermatologist. I think it helps with pigment loss too- fading pigment around the lips and nose.