Isn’t dock the same thing as Sorrel and of so a useful herb?I believe it is dock weed. If so, it has a very very long tap root. Get rid of it before it grows bigger or sets seed.
Mine love it too! I have a plant that comes up every year in the same place, yup, the root goes to China and I cannot get rid of it. So... the chickens get it.I've got half a yard of curly dock & the chickens are loving it. No more in their flight cage. I cut it & toss it in. They fill up on it during their walks.
See if the chickens are interested. Mine are.