Big C

They will eat all the bugs/worms that compost your compost. Also, your compost will be scattered everywhere. I personally would not do it.

We bought a 40x8x8 storage container, and buy feed to store at a discount by the volume price. But our stock consists of 2-5 head steers and 3-400 chickens. If we need extra forage (besides the pasture) we have a local organic hay supplier. Since we have an agricultural license, the container is tax deductible. You may check your tax laws to see what will benefit you for a long term investment in a silo as you described.

Leila wrote:
I haven't seen cattle fed forage so no opinion there, but Jami McBride's point about  the need to rotate stock to limit damage to land is important.
Similarly, if pasture doesn't get at least 21 days between grazing by cattle to break the parasite cycle, the worm load will be out of control.

Yes, naturally

We do this. Many variables are included, but you do not mention the amount of animals vs the acreage.  Our small 10 acre organic farm usually supports 3 head and approx 300 ranging hens, until this fall and winter. No significant rain for almost 5 months so our usual fall pasture never grew. Costs are more significant than usual. We have had to more than usual micro manage, and buy hay, along with more whole corn. This fall/winter meat crop is more expensive, but the very least we have the manure for garden and pasture. We purchase local natural range fed steers, then organic feed to slaughter maturity for sell. The flock(s) eggs are sold as well.