Nothing to thanks for @scienceblocks :-)
As a dog owner, I click on everything where a dog is in the thumbnail :-D
I must say it was a very interesting read which I hadn't expected in an actifit post.

As you say, they are very smart eating what they need. I just take care that she doesn't eat the grass along the road or grass that could contain pesticides or venomous plants. What I noticed, she eats a lot less grass in our own backyard. Probably it doesn't taste as good as it does in the forest.
I'm very curious about what you're going to figure out.