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Lupine-Induced Crooked Calf Disease: The Last 20 Years

Lee, Stephen T., Panter, Kip E., Gay, Clive C., Pfister, James A., Ralphs, Michael H., Gardner, Dale R., Stegelmeier, Bryan, Motteram, Ernie S., Cook, Daniel, Welch, Kevin D., Green, Benedict T., Davis, T. Zane
Rangelands 2008 v.30 no.6 pp. 13
calves, cattle diseases, congenital abnormalities, musculoskeletal diseases, disease incidence, Lupinus, fetotoxicity, teratogenicity, teratogens, alkaloids, disease control, Washington, Oregon, Idaho, Montana, Kansas, British Columbia
Many of the incidences report only calves that are destroyed. In our experience, there are substantial numbers of affected calves with minor to moderate leg deformities that eventually recover, and perform adequately in the feedlot with minor growth retardation. The real economic losses are not only calf deaths. Costs due to dystocia, caesarian sections, cow deaths, and added veterinary care are also significant. In many cases, lupine-infested pastores are abandoned or grazing is restricted so that potential forage is lost, and other forage must be purchased, thus adding to the economic toll. The emotional strain on humans from crooked calf losses and expenses is also substantial but difficult to quantify for both individual ranch families and their associated communities. Many ranchers that contributed to this report related the emotional stress they felt in anticipating the birth of more deformed calves.