Cow horns appear almost impossible to come by in any quantity. I'll try to aquire some before next autumn.
For those with chicken tractors, how important is the weight. I live and grow on a hillside so Linda Woodrow's poly pipe tractor makes sense but will it protect the birds from the cold weather. i have heaps of spare timber and tin but weight could become an issue. I designed a nice size tractor for around 8 birds but it would weigh around 55kg. Is that too much to drag around?