Calculating Slaughter Barrow and Gilt Grades Calculate the USDA grade for a 3301b barrow with an average muscling and 1.0" backfat:
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2. Calculate USDA grade for a gilt with 1.2" backfat and thin muscling:
3. Calculate USDA grade for a barrow with thick muscling and 1.4" backfat:
4. Calculate USDA grade for a gilt with average muscling and 1.38" backfat:
5. Calculate USDA grade for a barrow with average muscling and 1.28" backfat:

The return of the wolf to yellowstone national park will probably affect the bird population to some degree, not significantly. while wolves will hunt birds when necessary, they prefer to hunt larger prey. the bird population will most likely only be affected when hunting is scarce for the wolves. birds of prey will also probably not be affected as much as other birds who spend more time on the ground hunting for food as the tend to spend more time in the air or in trees since they do not need to stay on the ground for long due to the nature of the way they hunt.