I have used it on both my Siberians and the Labs and I found it did nothing for the Labs, but worked well with the Siberians. It does cause weight gain so you do not need to feed the recommended amount on the container. At first I double it for about a week then taper back to maybe a scoop a day and it works fine. I think it is probably better for the Siberian type of coat than the Lab coats. Just my experience.