Feeding Pig (Sow/Boar) with Alfalfa Hay
This page analyzes the use of alfalfa hay as a feed source for pig (sow/boar). At 18% crude protein and 58% TDN, alfalfa hay is meets protein but not energy as a sole feed for pig (sow/boar) at maintenance level (requires 14% CP and 75% TDN). Below you will find daily feeding rates, costs across herd sizes, and a life-stage breakdown showing how requirements change through the production cycle.
Alfalfa Hay for Pig (Sow/Boar) by Life Stage
Feed requirements change significantly across life stages. The table below shows the daily as-fed quantity of alfalfa hay needed for each pig (sow/boar) life stage, along with whether the feed meets the adjusted protein and TDN requirements for that stage. Life stages with higher demands (lactation, growth) may require supplementation even if alfalfa hay is adequate at maintenance.
| Life Stage | Daily DMI | As-Fed/Day | Protein Need | Protein OK? | Monthly Cost |
|---|---|---|---|---|---|
| Gestating Sow | 8.4 lbs | 9.3 lbs | 14% | Yes | $35.00 |
| Lactating Sow | 18.0 lbs | 20.0 lbs | 18.2% | No | $75.00 |
| Gilt Development | 13.2 lbs | 14.7 lbs | 16.1% | Yes | $55.00 |
Herd Feed Budget: Pig (Sow/Boar) on Alfalfa Hay
For operations feeding alfalfa hay to multiple pig (sow/boar) animals, the table below projects total feed requirements and costs. These estimates use the maintenance-level feeding rate of 13.3 lbs as-fed per head per day at $250/ton.
| Head Count | Daily As-Fed Total | Monthly Tons | Annual Tons | Monthly Cost | Annual Cost |
|---|---|---|---|---|---|
| 1 | 13.3 lbs | 0.18 tons | 2.19 tons | $50.00 | $608.33 |
| 5 | 66.7 lbs | 0.90 tons | 10.95 tons | $250.00 | $3,041.67 |
| 10 | 133.3 lbs | 1.80 tons | 21.90 tons | $500.00 | $6,083.33 |
| 25 | 333.3 lbs | 4.50 tons | 54.75 tons | $1,250.00 | $15,208.33 |
| 50 | 666.5 lbs | 9.00 tons | 109.50 tons | $2,500.00 | $30,416.67 |
| 100 | 1,333.0 lbs | 18.00 tons | 219.00 tons | $5,000.00 | $60,833.33 |
Feeding Rates by Body Weight
The daily amount of alfalfa hay varies with the individual animal's body weight. The table below shows as-fed feeding rates and monthly costs across a range of weights for pig (sow/boar).
| Body Weight | Daily DMI | As-Fed/Day | Monthly Feed | Monthly Cost |
|---|---|---|---|---|
| 280 lbs | 8.4 lbs | 9.3 lbs | 252 lbs | $35.00 |
| 340 lbs | 10.2 lbs | 11.3 lbs | 306 lbs | $42.50 |
| 400 lbs | 12.0 lbs | 13.3 lbs | 360 lbs | $50.00 |
| 460 lbs | 13.8 lbs | 15.3 lbs | 414 lbs | $57.50 |
| 520 lbs | 15.6 lbs | 17.3 lbs | 468 lbs | $65.00 |
Nutritional Analysis: Alfalfa Hay for Pig (Sow/Boar)
Alfalfa Hay provides 18% crude protein on a dry matter basis, while pig (sow/boar) at maintenance require a minimum of 14% crude protein. This means alfalfa hay provides 4 percentage points of protein above the minimum requirement, giving adequate margin for variation in feed quality and individual animal needs.
For energy, alfalfa hay provides 58% TDN compared to the pig (sow/boar) requirement of 75% TDN. Energy supplementation is needed. Adding corn (88% TDN), barley (84% TDN), or a fat supplement (180% TDN) to the ration would address the energy deficit. The amount of supplementation required depends on the magnitude of the shortfall and the animal's production level.
The dry matter content of alfalfa hay is 90%, meaning that for every 100 lbs of as-fed feed, the animal receives 90 lbs of actual dry matter nutrition and 10 lbs of water. At $250 per ton as-fed, the effective cost per ton of dry matter is $278. When comparing feeds, always use the dry matter cost rather than the as-fed cost to make fair comparisons between feeds with different moisture levels.
For a comprehensive feeding program, consider combining alfalfa hay with complementary feeds that address any nutritional gaps. Browse the complete feed comparison to identify the most cost-effective supplements, or use the calculator to model different feed combinations. Always provide free-choice mineral supplementation and clean water regardless of the forage and grain program.
More Feeding Combinations
Explore other feed options for pig (sow/boar) or see how alfalfa hay works for other species.
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