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547

New frontier in monitoring, early diagnostics and prevention of ketosis in dairy cows. K. L. Ingvartsen*, N. C. Friggens, and T. Larsen, University of Aarhus, Faculty of Agricultural Sciences, Tjele, Denmark.

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548

Neotyphodium coenophialum alters blood metabolites involved in nitrogen, energy, and mineral metabolism in growing steers. K. R. Brown*1, L. R. Harrison2, J. L. Klotz3, J. R. Strickland3, J. A. Boling1, and J. C. Matthews1, 1Department of Animal and Food Sciences, Lexington, KY, 2Livestock Disease Diagnostic Center, Lexington, KY, 3Forage-Animal Production Research Unit, USDA-ARS, University of Kentucky, Lexington, KY.

2:30 PM

549

Changes in lying behavior of lactating dairy cows associated with body condition score and milk yield. J. M. Bewley*1, R. E. Boyce2, L. Munksgaard3, C. Drummond4, J. Hockin4, B. Scott4, and M. M. Schutz1, 1Purdue University, West Lafayette, IN, 2IceRobotics, Ltd., Roslin, Scotland, UK, 3Danish Institute of Agricultural Sciences, Research Centre Foulum, Denmark, 4Barony College, Dumfries, Scotland, UK.

2:45 PM

550

Rectal versus peripheral temperature measurement using radio-frequency implants in steers challenged with lipopolysaccharide during periods of heat stress. E. D. Reid*1, J. M. Velasco1, and G. E. Dahl2, 1University of Illinois, Urbana, 2University of Florida, Gainesville.

3:00 PM

551

Hemodynamics in the caudal artery of yearling steers following removal from toxic tall fescue and placement on non-toxic diets. G. E. Aiken*1 and L. K. McClanahan2, 1USDA-ARS-FAPRU, Lexington, KY, 2University of Kentucky, Lexington.

3:15 PM

552

Response of digital dermatitis to treatment with topical lincomycin or oxytetracycline: comparison of gross visual and histopathological observations one month after treatment. B. Nuccitelli1, S. L. Berry*1, D. H. Read2, R. L. Walker2, and T. R. Famula1, 1University of California, Davis, 2California Animal Health and Food Safety Laboratory, Davis, CA.

3:30 PM

553

Mechanical properties of the solear hoof horn of heifers before and during the first lactation as a prediction of lameness susceptibility. B. Winkler1, J. K. Margerison*2, and C. S. Brennan2, 1University of Plymouth, Plymouth, UK, 2Massey University, Palmerston North, New Zealand.

3:45 PM

554

Effect of sample thickness, tissue moisture content and storage methods on the punch resistance and elastic modulus of the bovine hoof horn. B. Winkler1 and J. K. Margerison*2, 1University of Plymouth, Plymouth, UK, 2Massey University, Palmerston North, New Zealand.

2:00 PM

543

Utilizing neural network analysis in animal behavior studies. W. B. Roush*, USDA-ARS Poultry Research Unit, Mississippi State, MS.

2:45 PM

544

Identification of QTL affecting disposition in Bos indicus influenced cattle. C. A. Gill*, C. R. Boldt, C. A. Abbey, M. A. Wegenhoft, D. K. Lunt, J. E. Sawyer, A. D. Herring, and J. O. Sanders, Texas A&M University, College Station.

3:30 PM

545

Mathematical modeling and analysis of use of space. M. C. Christman*1, C. P. Miller1, and I. Estevez2, 1University of Florida, Gainesville, 2University of Maryland, College Park.

4:15 PM

546

Major pitfalls in animal welfare research. J. J. McGlone*1, L. E. Hulbert1, N. Krebs1, M. A. Sutherland1, and J. W. Dailey2, Texas Tech University, Lubbock, 2USDA Livestock Issues Research Unit, Lubbock, TX.

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SYMPOSIUM Animal Behavior & Well-Being - Livestock and Poultry New Methodologies Symposium Chair: Julie Smith, University of Vermont 205

Animal Health - Livestock and Poultry Bovine II Chair: Heather Dann, William H. Miner Agriculture Research Institute 217 C

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555

Breeding and Genetics - Livestock and Poultry Dairy Cattle II Chair: Filippo Miglior, Agriculture and Agri-Food Canada 214 B

Performance and physical conformation of first parity backcross Holstein x Jersey cattle and their Holstein contemporaries. K. A. Weigel*, T. J. Halbach, C. Maltecca, and P. C. Hoffman, University of Wisconsin, Madison.

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