My horses love balage baled silage only problem is I don’t use enough to be able to use a full bale once opened before it goes off
Another option I have heard of but not used that could work on a small scale. Grass is cut left to wilt for a day then stuffed into large plastic garbage bags suck as much air out with a vacuum cleaner then seal the bag. It might be useful to pile the grass up and roll it with a vehicle before stuffing it into the bag to compact it and get as much air out as possible. A lot of work for a small amount of feed. But you don’t need special gear and you can open one bag at a time, as you need it saves it going off