There are mainly three different types of implants used in beef production. The first one is made up of more natural hormones, for example progesterone, estrogen and testosterone. These three hormones are all produced by the animal. If these hormones are used they are used as a single estrogen implant or as estrogen that are combined.
The second implant contains an ingredient that signals to the animal’s brain to produce more of the natural hormone.
The third type has a synthetic testosterone combined with estrogen.
(To read more about the different brands click here)
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Most facilities have different programs that they choose to use. Many programs lay out specific things like the date the cattle are brought in, weight they are brought in, age, and time they are expected to be finished. This can help the managers determine if they are going to implant the cattle once, twice or even up to three times depending on the implant they use. Different implants vary of the length in which they absorbed over.
The programs vary from brand to brand but all of them work in similar ways. According to “Implant Strategies for Finishing Cattle” found on Merck-animal-health-use’s website it is recommenced to “let the cattle tell you when they are finished, look at the cattle’s body composition and feed records since not all 700 weight animals are the same.”
Sources:
http://beef2live.com/story-feeder-cattle-grading-0-105331
http://www.merck-animal-health-usa.com/binaries/39318_RevXS_TB_12_Strategies_Finishing_Cattle_Final_tcm96-86719.pdf
http://extension.uga.edu/publications/detail.cfm?number=B1302
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