Purina® Horse Feeding Calculator

1.Select a lifestyle and weight of horse. (Note: Weights will change based on the lifestyle selected)
2.Read daily calorie requirement in upper left window.
3.If little or no quality hay/pasture is available, choose from one of the complete feeds in the upper row, and feed as recommended.
4.When feeding hay, refer to daily hay requirement in the lower left corner, and choose from the concentrate feeds in the lower row. If feeding more than the suggested amount of hay or horse is grazing unlimited pasture, then reduce the recommended amount of concentrate feed.  If the amount of feed to maintain body condition is below 0.3 lbs per 100 lbs of body weight per day (3 lbs for a 1000 lb horse; 3.3 lbs for a 1100 lb horse), Nature's Essentials Enrich 32 or Enrich 12 would be a more appropriate choice.
5.Feeding rates recommended for concentrate feeds are based on feeding with good quality grass hay.  If using good quality alfalfa hay, reduce the amount of Purina feed recommended by 1/2 to 1 lb/day.
6.Make feed changes gradually over 7-10 days.  Weigh feed with a scale.  Clean, fresh water and salt should be available at all times.
Start with the amounts given for the weight and class of horse. However, individual horse variation may require feeding rate adjustment by plus or minus 10-15% (do not increase or decrease amount fed by more than 1 lb per day). Thereafter, the horse's body condition should be assessed at regular intervals (every 2-3 weeks) and the amount fed either increased or decreased to maintain the desired body condition. Click here to see the body condition score chart.

  • If lactating mare and foal are fed together, increase amount offered by 1 lb per month of age (of the foal) per day.  Select Omolene #300, Ultium Growth or Strategy. 
  • When feeding Equine Senior, Equine Adult, Equine Junior, Omolene #400 or Horse Chow with hay, reduce about 1 lb. for each 2-3 lb. of hay fed.  If feeding less than 0.6 lbs per 100 lbs of body weight (6 lbs per day for a 1000 lb horse), then supplement with Enrich 32, Enrich 12 or Free Balance 12:12 vit./min. supplement.
  • When feeding Equine Junior as a complete feed, a maximum of 5 lbs. of good quality hay may be fed to help alleviate boredom.


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