Feed Lot

JUN 2018

Feedlots and cow/calf operations in the beef industry who feed 500 or more has annually on grains and concentrates; maintain 500 or more beef cows; backgrounder, stocker/grower, preconditioner; veterinarian, nutritionist, consultant

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Microbial Insight Since 1971 Unique Five-strain Combination of Bacteria Delivered in a Patented, Stable Form that Ensures Viability, Consistency and Ease of Use DIRECT-FED MICROBIAL FOR BEEF 10-G Improving Health , Performance and Profitability from Start to Finish Life Products - Ensuring live, beneficial Bacteria are reaching your animals every day For more information, call 1.800.658.3120. 2 Sprinklers or Misters? Consider the type of cattle. Are the cattle you are feeding northern cattle that still have some winter hair, or are they slick-hided? That can make a difference in how you cool those cat- tle. In the north central plains, in May, June and early July, some of those cattle will still have a hair coat. Water from misters might not penetrate the winter hair and reach the skin for evaporative cooling. The mist on their hair could even create a water vapor barrier, preventing water to reach the skin. However, the further south you go there's a greater chance cattle have lost their winter hair coat. I've seen misters work quite well mid-July through August with a slick hair coat when the water is able to reach the skin. Sprinklers, on the other hand, have larger droplets of water that penetrate the hair coat and reach the skin. Since most feedyards use underground water, it is cold and a cooling sensation is almost immediate for cattle. That said, sprinklers do use a lot more water, so you have to weigh several factors to determine what is best for your operation. 3 Schedule sprinklers/misters to run on a regular basis. Timers that turn on sprinkler systems at set times help reduce the quantity of water used and en- sure the heat mitigation strategy is utilized on a regular basis. Cattle adjust to heat abatement strategies, and if those strategies disappear, they may not be able to handle the increased heat load. One of the worst things you can do is get cattle adjusted to a sprinkler system, and then forget to turn it on one day. Systems that run about 10 minutes every hour or 15 minutes every 90 minutes will cool the cattle and the ground they stand on. If you put more time between each use, the cattle can dry off and get hot. 4 Position sprinklers to cover a portion of the pen, not all. Because sprinklers and misters can elevate the humidity in a pen, don't spray the entire pen with water. Instead sprinkle 1/4 to 1/3 of the pen. If it is a still day with little air flow, cattle can move to a dry portion of the pen if humidity is a problem. 5 Location, location, location. Although it's convenient, don't install misters or sprinklers right above water troughs. Cattle will already be crowding the water and sprinkler areas. If those areas are one in the same, less aggressive cattle can't get to water to drink, so they are compromised. Instead, sprinkle an area away from the water trough so cattle have to move from the cooled area to the water trough. Consider how many animals can get to the water, and the area you sprinkle. Keeping cattle cool can combat the typical 15 to 20% drop in feed consumption often seen during hot summer months. If your water supply can handle the increased load from both livestock drinking and a sprinkler or mister system, cooling cattle with water is a good heat management strategy. FL AS TOLD TO JILL J. DUNKEL FEED•LOT June 2018 7 BEST UTILIZE YOUR ARD SPRINKLER SYSTEM

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