Livestock News

Ear tags + implant= 40 pound weight gain


A Kansas State University study has found by using ear tags in combination with growth implants, cattle can put on a little more weight.

Beef cattle specialist Dale Blasi said using the two treatments reduces horn flies, a nuisance that costs the U.S livestock industry approximately $1 billion in losses each year, according to a recent Oklahoma State University report.

The Kansas State University study showed that when using the two treatments separately in stocker cattle grazing for 90 days, those animals increased live weight gain by 15 or 16 pounds.

But when the treatments were used together, “our gains were incredible,” Blasi said in a recent release.

“We were picking up 30 or 40 pounds of live animal gain relative to doing one or the other alone.”

Though the actual benefit to producers’ profits will vary, at a price of 70-80 cents per pound, Blasi said the added value could be about $25 per animal. “And after you remove the cost of the products, you’re still several dollars ahead.”

The university’s work was a follow-up to an earlier study in which researchers looked at the effectiveness of ear tags in reducing horn flies, which slow cattle’s growth due the stress and resulting energy loss they cause.

Ear tags contain insecticides that reduce the fly populations and allow the cattle to graze stress-free. The K-State study showed that cattle with one ear tag gain an additional nine pounds of live weight, and those with two ear tags gained 12 pounds.

The newer study tested the use of ear tags and an injectable growth implant called Long Range, a product that was not known previously to be a deterrent to flies. Blasi and his colleagues used a digital camera and software to count flies in a field where cattle were grazing.

“What we observed was a significant decline in the number of flies compared to another product,” he said. “There was a dramatic difference.”

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