Yearlings need about 12.5% protein and energy of 4.95 to 5.95 Mcal per 220 pounds a day, depending on the size you have guessed they will be as an adult.
For a yearling of approximately 300 kg (700 lb) who is expected to grow to 500 kg (1100 lb) mature weight, this means the following: |
Energy: 19-21 Mcal DE/day
Crude Protein: 900 g (2.0 lb)/day
Calcium: 37 g/day
Phosphorous: 18 g/day
Magnesium: 6.0 g/day
Selenium: 0.80 mg/day
Copper: 90 mg/day
Zinc: 320 mg/day*
*From "The Horse Nutrition Handbook," credit goes to Melyni Worth. Yearlings should be lean, overweight yearlings often lead to health problems as adults. Don't feed a lot of sugary, starchy carbohydraty stuff like sweet feed, corn, molasses, etc.