Generally freezer burn shows as a dry, whiteish patch. Slice it off, as others said -- give to dogs/cats or trash -- rinse the meat and cook. Most often you cannot then tell any difference when cooked.
haylage -- yep, I saved instructions and it's basically removing air, then storing in dark/dry/reasonable temps. I remember that I thought, at the time, that the vacuum storage bags might be a good holding device. Maybe reuse? Store in a black bag or tarp. My chickens love fermented cheese, clabbered milks, etc. Many people use fermented grains. No, they are not ruminants but they eat grass!! In fact, in early winter I've wet straw bales, which then sprout and they attack with gusto! LOL Ruminants just eat fast, half chew, then belch it back to chew and swallow down to digest further, another stomach -- well, very simplified version of their system.
Since I live where we do not have -- NORMALLY -- extreme cold, frozen ground very deep, if I leave things like turnips, beets, carrots in ground & mulch, I can pull/dig and use them most all winter. At that point, the roots don't need the greens so much, done growing, so I or animals have those greens devoured first. LOL Many of our winter greens are very good for the animals, seeds are cheap and they grow well for some forage. Mixes like used for deer plots are great for goats. Just keep the birds off the seed! I like to toss it out, mow or drag, just as it's going to rain -- very late day and night rain is perfect. Some will sprout & I've had some just lay there & sprout early Spring. It's a crap shoot.
Pumpkins, winter squash, all get a hard skin & can store thru winter....chickens & goats love both. Sunflowers. Any cole crops that want to continue to grow (& seed?) yep, they love it. Winter wheat is good forage. Don't let horses on it once it heads, too much & bad colic....but in grass stage, ok. In head stage, it can be cut/bagged as a silage.
MAJOR issue with these fermented feeds is any mold toxins. Really bad. Sight and smell should be your first indicator. I do not use any ferments with horses. Worse than moldy hay, even.
