Feeding Horses

Last week during our student theory lessons I was teaching feed including calculating feed rations for horses in different enviroments, some students were having a little difficulty working out feed rations so I found this piece on the internet which I thought maybe of interest.

The Impact of Cold Weather The following formula is used to calculate the increased DE (daily energy) requirement for a horse as a result of cold temperatures and wet, windy conditions: critical temperature – actual temperature = % increase in DE required.

Adjusting Energy Intake: An Example The following example clarifies how to adjust energy intake for a dry environmental temperature of 30°F with a wind chill that results in an actual temperature of 25°F. The example applies to a 1,100-pound horse at maintenance.

Step 1. Subtract the actual temperature (including the wind-chill adjustment) from the critical temperature (accounting for wet conditions if necessary): 45°F – 25°F = 20% increase in DE requirements.

Step 2. Because a 1,100-pound horse at maintenance requires 16.4 Mcal of DE per day and because the horse in this example requires a 20% increase in DE, you multiply as follows: 16.4 Mcal x 20% = +3.28 Mcal increase. The requirement thus increases as follows: 16.4 Mcal + 3.28 Mcal = 19.68 Mcal DE/day.

Step 3. Next you need to determine the amount of feed necessary to supply these increased calories. A 1,100-pound horse typically consumes 19 pounds of ration daily (1.7% of its body weight). Because the recommended DE level of the ration (concentrate mix plus forage) fed to a horse at maintenance is .90 Mcal DE/lb of feed, we can calculate the increase in feed as follows: 3.28 Mcal ÷ .90 Mcal = 3.64 pounds of additional feed to provide 19.68 Mcal DE/day.

Step 4. Determine the total amount of feed the horse requires by adding the 3.64 pounds of additional feed to the 19 pounds of feed the horse requires under normal conditions: 19.0 + 3.64 = 22.64 pounds per day of total ration.

Makes it all the clearer but I think I will stick to double the height and minus 5

Posted on Monday, November 30th, 2009 at 1:56 am You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.