Feed Lot

DEC 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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16 FEED•LOT December 2018 "You feed them up on whatever your byproduct is, get them all pregnant and say, 'Oh, by the way, you are never going to see that again.' A lot of our work," Funston said, "is focused on let's treat that heifer like she is going to be treated as a cow." Aiming for 95% or more bred is folly, he added. "If I can get that, am I really selecting for the more fertile ones?" Better to get cattle to rebreed a few points lower than that, but on low-cost feed such as corn stalks. Data on early-born steers has shown their advantage from feed- yard to packinghouse and beef quality grade, but recent data also shows heifers born in the first 21 days of a calving season are heavier at weaning, gain at the average rate after that and begin cycling before the breeding season. They have a higher pregnancy rate, more in the first 21 days, breed back sooner and wean a heavier calf than average. Unfortunately, many producers cull the early-born heifers for be- ing too big, not realizing they are simply older. "This is a mistake," Funston said, urging adoption of some quick visual tool such as notching ears of those early heifers. "Get rid of those that are born late." Heifers most likely to settle the first time and then rebreed on time are more likely to stay in the herd long enough to make a profit. FL PRODUCT INFORMATION NADA 141-299, Approved by FDA. (Florfenicol and Flunixin Meglumine) Antimicrobial/Non-Steroidal Anti-Inflammatory Drug For subcutaneous use in beef and non-lactating dairy cattle only. Not for use in female dairy cattle 20 months of age or older or in calves to be processed for veal. BRIEF SUMMARY: For full prescribing information, see package insert. INDICATION: RESFLOR GOLD ® is indicated for treatment of bovine respiratory disease (BRD) associated with Mannheimia haemolytica, Pasteurella multocida, Histophilus somni, and Mycoplasma bovis, and control of BRD-associated pyrexia in beef and non-lactating dairy cattle. CONTRAINDICATIONS: Do not use in animals that have shown hypersensitivity to florfenicol or flunixin. WARNINGS: NOT FOR HUMAN USE. KEEP OUT OF REACH OF CHILDREN. This product contains material that can be irritating to skin and eyes. Avoid direct contact with skin, eyes, and clothing. In case of accidental eye exposure, flush with water for 15 minutes. In case of accidental skin exposure, wash with soap and water. Remove contaminated clothing. Consult a physician if irritation persists. Accidental injection of this product may cause local irritation. Consult a physician immediately. The Material Safety Data Sheet (MSDS) contains more detailed occupational safety information. For customer service or to obtain a copy of the MSDS, call 1-800-211-3573. For technical assistance or to report suspected adverse reactions, call 1-800-219-9286. Not for use in animals intended for breeding purposes. The effects of florfenicol on bovine reproductive performance, pregnancy, and lactation have not been determined. Toxicity studies in dogs, rats, and mice have associated the use of florfenicol with testicular degeneration and atrophy. NSAIDs are known to have potential effects on both parturition and the estrous cycle. There may be a delay in the onset of estrus if flunixin is administered during the prostaglandin phase of the estrous cycle. The effects of flunixin on imminent parturition have not been evaluated in a controlled study. NSAIDs are known to have the potential to delay parturition through a tocolytic effect. RESFLOR GOLD ® , when administered as directed, may induce a transient reaction at the site of injection and underlying tissues that may result in trim loss of edible tissue at slaughter. RESIDUE WARNINGS: Animals intended for human consumption must not be slaughtered within 38 days of treatment. Do not use in female dairy cattle 20 months of age or older. Use of florfenicol in this class of cattle may cause milk residues. A withdrawal period has not been established in pre-ruminating calves. Do not use in calves to be processed for veal. ADVERSE REACTIONS: Transient inappetence, diarrhea, decreased water consumption, and injection site swelling have been associated with the use of florfenicol in cattle. In addition, anaphylaxis and collapse have been reported post-approval with the use of another formulation of florfenicol in cattle. In cattle, rare instances of anaphylactic-like reactions, some of which have been fatal, have been reported, primarily following intravenous use of flunixin meglumine. Made in Germany Intervet Inc. Roseland, NJ 07068 ©2009, Intervet Inc. All Rights Reserved. May 2009 US 3448_IV The reproductive physiologist with the University of Nebraska- North Platte addressed 200 cattle- men at the Feeding Quality Forum this summer in Sioux City, Iowa. While input costs should be minimized in times like these, "breakeven at best" for many, he said, it won't pay to compromise fertility in the process. "Fertility is the most important trait in beef production, especially in the cow-calf sector, but all the way to the plate," Funston said. "If we don't have a live calf, we don't have anything for the consumer." That's why he focuses much of his work on replacement female development. "It's a huge financial cost be- fore she produces a weaned calf," Funston said. "We have to look at low-input development so we don't have exorbitant costs for a female that's difficult to get rebred." Relatively cheaper feed such as corn residue may bring slower gains, but he noted that's often no problem for five-weight weaned heifers that only need to gain 250 pounds. When the optimum percentage get bred and move on to better nutrition on summer grass, they respond more favorably than their peers developed to a higher weight on better feed. The slower-start heifers rebreed at a higher rate and stay in the herd longer because their diets fluctuate less than heifers given every early feed advantage. COW/CALF CORNER Lower Heifer Costs NOT FERTILITY BY KATRINA HUFFSTUTLER It's a great time to own cows, but only if you have a competitive cost structure with the right genetics and management to compete in today's marketplace, Rick Funston said.

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