Here's what the SPN guideline for a heritage grower on pasture.
Nutrient: Units:
CRUDE PROTEIN 20.1 %
CRUDE FAT 7.8 %
CRUDE FIBER 5.5 %
CALCIUM 1.20 %
PHOSPHORUS 0.78 %
SALT (ADDED) 0.32 %
SODIUM 0.17 %
M.E. (PLTY) 1291 KCAL/LB
VITAMIN A 6.13 KIU/LB
VITAMIN D 1.61 KIU/LB
VIT. E (ADDED) 50.0 IU/LB
LYSINE 1.00 %
METHIONINE 0.42 %
METH + CYSTINE 0.63 %
MANGANESE 92.1 PPM
ZINC 70.6 PPM
IRON 64.6 PPM
COPPER 5.64 PPM
IODINE 3.78 PPM
SELENIUM 0.32 PPM
This is for comparison. Sorry about the formatting.
Nutrient: Units:
CRUDE PROTEIN 20.1 %
CRUDE FAT 7.8 %
CRUDE FIBER 5.5 %
CALCIUM 1.20 %
PHOSPHORUS 0.78 %
SALT (ADDED) 0.32 %
SODIUM 0.17 %
M.E. (PLTY) 1291 KCAL/LB
VITAMIN A 6.13 KIU/LB
VITAMIN D 1.61 KIU/LB
VIT. E (ADDED) 50.0 IU/LB
LYSINE 1.00 %
METHIONINE 0.42 %
METH + CYSTINE 0.63 %
MANGANESE 92.1 PPM
ZINC 70.6 PPM
IRON 64.6 PPM
COPPER 5.64 PPM
IODINE 3.78 PPM
SELENIUM 0.32 PPM
This is for comparison. Sorry about the formatting.