Feedback on my experience of making silage.
I gathered my last lawn mowing and stuffed it into a blue plastic barrel. Pressed it down hard, actually climbed in and jumped down on it. Put more cuttings in and jumped again, and repeated until I could just get the lid on. (I don't think one can make a half barrel as that would mean there was too much air in the mixture, which means it would have a different chemical reaction and end up as something other than yummy silage.) Put lid on tightly and turned it upside down. As it was so late in the season there were a lot of leaves already mixed in. In March I openned it and it smelled lovely, I think one could make soup out of it. The sheep were not too impressed, but the following day most of it was gone, apart from the leaves.
I only have 3 sheep, and they are little Ouessants, so they did not get through much before the silage went mouldy and therefore can no longer be eaten. I was surprised how quickly it went mouldy, especially as I was careful to always put the lid back on. I suppose the new air that went in every time I opened it. I'm not sure, but I think it went mouldy within 3 weeks.
I will do it again next year, and early so less leaves. Actually I will do it more for the good feeling of creating something useful out of something 'waste' which always appeals to me. If I could make smaller amounts I would, so that it wouldn't have to stand around open for so long.
Overall easy to do, and worth the effort (very little effort needed), but should be eaten quickly, and keep a careful eye out for the developing mould which I know is bad for horses, so guess to be also bad for sheep.