Yup I replaced one wooden panel with a long hurdle then fixed another hurdle to the outside about halfway up. I tilted the outside hurdle to an angle sufficient to take a bale and fixed it in place with good old baler twine! Then I used some waterproof membrane and a few well place knots to make a cover for the open top to keep the rain out
If after a week it prove still to be sucessful I will replace the twine with chain to make it more permanent.
I do need to rig something up to catch dropped hay still as they still waste it
I am rather please with it, all four big girls can eat from it at once without squabbling and in nice weather they can eat from the outside of it too!