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Phenotypic and Genetic Associations of Objectively Evaluated Replacement Female Feet and Leg Joint Conformation at Selection and Post First Parity

Post First Parity A.S. Leaflet R3277 Joseph D. Stock, Graduate Student, ISU; Julia A. Calderón Díaz, Postdoctoral Research Associate, Teagasc Moorepark Grassland Research and Innovation Centre

Effect of Ad libitum Feeding of Gilt Developer Diets Differing in Standard Ileal Digestive Lysine Concentrations on Growth Traits

Authors China Supakorn, Clay Lents, Joseph D. Stock, Jeffrey L. Vallet, Terry J. Prince, Christine E. Phllips, R. Dean Boyd, Ashley E. DeDecker, and Kenneth Stalder This swine is available in Animal ... . Leaflet R3276 China Supakorn, Visiting Assistant Professor, ISU; Clay Lents, Supervisory Research Physiologist, USDA, U.S. Meat Animal Research Center, Reproduction Research Unit, Clay Center; Joseph D

Changes in Feet and Leg Joint Angles in Gilts Divergently Selected for Residual Feed Intake during their First Gestation

This study attempted to characterize any potential changes in feet and leg characteristics due togestation stage, genetic line difference or lameness status during the gilt’s first gestation.Joint angles for knee, hock, front and rear pastern were measured in 40 Yorkshire gilts divergently selected for residual feed intake (RFI) on days 30, 60 and 90 of gestation. On the same...

Pictorial Depiction of the Lying-down Behavior of Lame and Non-lame Multiparous Gestating Sows

Science, Iowa State University; Joseph D. Stock, Research Assistant, Department of Animal Science, Iowa State University; Kenneth J. Stalder, Professor, Department of Animal Science, Iowa State University

Characterization and Symmetry Study of Objective Feet and Leg Joint Measurements in Five Separate Lines of Maternal Gilts

This study involves the initial measurement and joint description of five maternal gilt lines for the validation of objectively measured feet and leg joint angles in regards to sow longevity. The initial measurement was used to characterize all gilts used in the study based on age and line as well as to study the symmetry between the left and right sides of the animals’ body...

Time Required for Lameness Detection on an Embedded Microcomputer Based Force Plate in a Lab Based Setting

authors are grateful for the assistance provided by Becky Parsons, Lori Layman, and the employees at the Sow Longevity Lab. Authors Brady M. McNeil, Caitlyn Abell, Joseph D. Stock, Anna K. Johnson

Identifying Sow Lameness Using an Embedded Microcomputer Based Force Plate System in a Commercial Setting

M. McNeil, Joseph D. Stock, Julia A. Calderón Díaz, Anna K. Johnson, Kenneth J. Stalder, Locke A. Karriker, and Tom Parsons This swine is available in Animal Industry Report: http

Digital Evaluation of Structural Phenotypes Common among Higher Parity Crossbred Sows

Two independent, commercial, crossbred sow populations were selected to compare feet and leg structure in order to identify commonalities among them that may contribute to their long herd life. Digital imagery was used to measure the angle of the knee, pasterns and hock joints as well as the overall rear stance in sows ranging from parity 5 to 14. Parity and population effects...