Yep anything you want to live has to have ft knox around it. My waterfowl can't come into the backyard unless I open the gate some of my LF chickens just fly to the top and come right on in. The day my comfrey was eaten to the ground was the day I let my ducks come in the back yard for a visit. Scoundrels ate it down to the ground, but thankfully it came back.Mine love Comfrey too! I found plants at the nursery several years back. Like you, I came out to find all but one eaten by my ducks. That one I protected with a wire cage. Now that my ducks are fenced off away from it, it is huge. Thanks for reminding me. I think they will get some today.