Very bad weed! Hundreds of these young burdock plants have appeared in the pasture, the gardens, in full sun and shade. Sure, they look innocent now. And yes, I know the mature roots are edible and even useful in therapeutic preparations. (More about that another day...)
It's the burrs that cause the problems. They're often called cockleburrs, though that's not correct. The cockleburr comes from a different plant, though the burrs are about the same size and cause as much trouble. Last fall I spent hours untangling the burdock variety of burr trouble from the dogs' coats. The goats' beards turned into tangled, matted messes in one afternoon of grazing, so I took the easy way out and cut their beards off. The sheep? Well...that was just sad...they'd have been embarrassed if they'd been allowed mirrors.