My dog loves a certain kind of weed. I have no clue what it tastes like (though I'm dying to try). Whenever he senses this weed, he starts grazing like a cow. He's never gotten sick off of it. He's pretty regular so I know he doesn't want it because of constipation. He cannot get enough of this weed/plant. And, its the only greenery (is that a word?) that he eats outside of the veggies/fruits I give him.