I’m very careful about what I allow to go into the sensitive stomachs of my GSD’s. So, I started out slowly with these. I didn’t have to give the full amount suggested by the container; instead, I’ve given my dogs 3 about every other day, and I actually have no brown spots in my grass. To make sure it wasn’t a fluke. I stopped these treats for a few weeks, and brown spots appeared again. I will keep using these!!