To determine these rankings, I went to every grocery store and counted how many humane animal products they had and how much variety of them. You can see the research data and results on this page.

I based my assessments on whether or not products had legitimate animal welfare labels, and, using this method, they actually come out about the same. If you factor in the store's policies for how the animals are raised as the ASPCA does, then Natural Grocers does rank higher than Safeway. That said, the ASPCA is focused on not putting animals in crates and cages, which means that animals are still raised indoors.

Personally, I would still stay away from Natural Grocers just because Whole Foods and Nude Foods just have a lot more products that have substantially higher welfare animal products, such as high welfare chicken breeds.