Here is the guaranteed chemical analysis of a popular and widely accepted brand of chicken feed (a layer pellet)
I wish to draw your attention to lines # 9 and 10
Guaranteed Analysis:
1. Crude Protein 16% (min)
2. Lysine 0.7% (min)
3. Methionine 0.3% (min)
4. Crude Fat 2.5% (min)
5...