What Happens to Forage After You Open the Film — and How to Avoid Waste

As long as the film is intact, fermented forage is stable for over a year. But the moment you cut the film, everything changes: oxygen contacts the forage and starts a process you can no longer stop. The good news is that if you understand what's happening, you control it and lose nothing.

Why degradation begins

Anaerobic fermentation stabilized the forage precisely through the absence of oxygen: the low pH blocked mold and rot. When you open the bale, you bring oxygen back. The yeasts and molds that were held in check begin to reactivate, the forage warms slightly, and it gradually loses value and palatability. It's a natural process, not a defect — it appears in any fermented forage, however good.

How fast to use it

The pace depends on temperature:

• Summer: use the opened bale within 3–5 days.
• Winter: 5–7 days.

In heat, the warming process is faster, so the window is shorter. In winter you have a few extra days, but not indefinitely.

Why bale size matters

Here's the practical link many people miss: an opened bale must be consumed before it spoils. If you have a small herd and a large bale, you can't finish it in time and you throw away the difference. If you have a matching herd, the bale is consumed exactly within the good window.

A ~500 kg bale suits herds of roughly 15–20 head and up — at this herd size, the quantity is consumed rhythmically, without losses. For smaller herds, talk to us about the right format, so you don't pay for forage you can't use in time.

How to minimize losses

• Open a bale only when you're ready to feed it rhythmically.
• Keep the cut face as smooth and small as possible — the less surface you expose to air, the slower it degrades.
• Don't open more bales at once than you can consume within the day window above.
• Keep the rest of the stock with intact film until the moment of use.

Fermented forage is good goods as long as you manage it at the right pace. It's not about hurrying, but about syncing how much you open with how much you consume.

See also the storage guide →