Grain feeding in an intensive feeding program

What makes the difference in rumen development is not the starter fed but starter consumed. Palatability seems to be the crucial factor for intensive feeding program calves.

CHOICE OF STARTER GRAIN

While at Noblehurst Farms I tried feeding a pelleted starter rather than a textured feed with calves on an intensive growth program. It was a flop!

For the calves consuming nearly three pounds of milk replacer powder daily, pelleted grain intake was nearly zero even at seven weeks of age.

For the same feeding program with textured grain, calves began eating substantial amounts around four weeks. We may force limit-fed calves (one pound of powder or less daily) to consume pelleted feed in order to survive.

Our experience with calves fed milk replacer at two or three-pound levels daily clearly indicated better consumption with textured starter. But, remember, not all pelleted feed is the same so maybe you can find one that will work.

What makes the difference in rumen development is not the starter fed but starter consumed. Palatability seems to be the crucial factor for intensive feeding program calves.

FLUID INTAKE AND WEANING

All of us like to wean calves without any break in their daily gains. Also, we would like to limit the stress so that none of them get sick. So, without having heifers drop in rate of gain or get sick, how do we decrease the amount of milk fed in order to encourage greater consumption of starter grain?

One method of weaning high fluid intake calves is to reduce the dry matter content of the mix by one-half at weaning time while continuing to feed the same volume of fluid. For example, for calves receiving two pounds of powder daily in AM and PM three-quart feedings preweaning, we would continue two three-quart feedings but reduce the total powder per day to only one pound.

In order to evaluate this idea, I compared average age at weaning (calves weaned when over thirty five days old and eating two or more pounds of starter for three days in a row) for two groups of fifty calves.

Preweaning, both groups were fed approximately one pound of powder twice daily in three quarts of mix. One group at thirty-five days received only the morning milk replacer feeding (one pound of powder) and continuous free choice water along with starter grain. The other group at thirty-five days continued to receive both AM and PM milk feedings. But, they were half strength – one-half pound powder AM and PM for a total of one pound daily – a constant volume of liquid fed daily.

Calves were assigned to their group randomly. Each group ate the same amount of milk replacer powder each day. The constant-volume group weaned an average of ten days later than the AM-only group. I only weighed ten calves out of each group so it’s hard to be certain of our growth results. But, we did not observe any significant differences in average daily gain.

REDUCING MILK TO PROMOTE GRAIN INTAKE

It is a pretty well established general rule that, given a choice, calves will drink milk rather than eat grain. If cost was not a factor, we could pour free choice milk into calves and get great gains. Then, at three months or so, we could work on getting rumen development. But cost is a factor.

My intensive feeding program’s goal was to get optimum gains in the preruminant phase of growth. Then, at roughly four weeks of age I increased my emphasis on rumen development.

Abrupt weaning of rumen-incompetent calves results in weight losses even as high as two or more pounds daily as well as serious morbidity problems until competence is achieved. Clearly, most producers want to achieve rumen competence prior to weaning.

Some calf raisers feed enough energy and protein from milk replacer to meet most newborn calves’ maintenance needs and genetically determined needs for growth. As calves grow these combined needs exceed the nutrients provided by milk replacer.

The calves will begin to eat starter grain as an alternative source of energy and protein. This assumes calves have discovered that grain is food!

If a calf raiser feeds a limited amount of milk, most calves by three or four weeks of age will discover starter grain. They will begin to eat substantial amounts of it. These calves do okay.

However, in this limited feeding situation, the calves that lag behind in beginning to eat starter grain get stressed out. And, they frequently are treated for pneumonia.

Alternatively, if a calf raiser feeds a large amount of milk replacer (2-3 pounds per day), most calves by three or four weeks of age will discover grain anyway and begin to eat small amounts of it. The difference in grain consumption between feeding programs is primarily in the amount rather than the timing.

During a recent feeding trial I fed some calves that were the same age 2.9 pounds of milk replacer daily. As you might have predicted, larger calves with higher maintenance requirements started digging into the starter grain sooner than smaller calves.

Among the larger calves (ninety-five pounds at birth and larger) significant starter grain intake (greater than one cup daily) began at an average of eighteen days. These same calves began regularly eating two pounds of starter grain daily at an average of thirty-nine days. The smallest calves took proportionately longer both to begin eating starter grain and to get up to two pounds daily.

Through the process of trial-and-error, I eventually worked out a feeding program that balanced:

  • High dry matter intake from milk replacer early in life
  • Need to encourage early rumen development.

I started reducing the amount of milk replacer fed around the fourth or fifth week depending on the level of milk replacer powder fed. I had a lot of experience with calves fed two pounds of powder daily.

At thirty-five days, nearly all of these calves were eating at least a pound of starter daily. At this time I cut out the PM milk feeding – remember they had continuous free choice water.

After this milk replacer reduction, starter grain consumption usually at least doubled with three to five days. Most of these calves were ready to wean between forty-four and forty-eight days. They averaged approximately 1.8 pounds daily gain birth through fifty-six days. Their pneumonia treatment rate was under five percent.

At rates higher than two pounds of milk replacer powder a day, I saw a wider spread among calves in rate of gain. It was pretty much related to birth weight.

I had to use a two-step reduction in milk feeding, starting at four weeks. Weaning was done based on starter grain intake rates. The largest calves weaned around forty-five days. The smallest ones weaned about fifty-five to sixty days.

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Author

Sam Leadley

Sam Leadley
62 articles

Consultant on Calf/Heifer Management at Attica Veterinary Associates.

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Attica Veterinary Associates

Attica Veterinary Associates

Attica Veterinary Associates provide veterinary services and products, independent consultation in dairy management, nutrition and performance, and trainings.

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