I have a manmade pond with a waterfall, and a walkway behind it. I need something to block access to the waterfall... something portable... so I can move it and garden behind it. My dogs keep passing behind, and knocking rocks into the pond, and then I have to fish them out and reset the liner! But my chickens free-range. I have most of my garden done so they can't get to it, but I want to put something here that is less likely to be eaten by the chickens. It will be planted in a 5-gallon bucket and can have a foot of chicken wire around it, above the bucket, but I want something that will spread out. I was thinking tomatillos, but don't know if the chickens will go for the leaves. They're not starved at all, but there's no longer any greenery left in the yard, so they freak out whenever I bring in something growing. I was also thinking of planting flowers that spread out, but have the same problem there.