Date of Award
Master of Science
Veterinary Diagnostic and Production Animal Medicine
Veterinary Preventative Medicine
A cohort study was conducted in a population of crossbred feeder steers at a commercial feedlot in central Iowa. This study assessed the relationship between Whisper® lung scores taken at feedlot arrival and feeding performance and health performance. Lung scores were taken at initial processing along with individual weights. Feeding performance outcomes included average daily gain (ADG), feed efficiency (FE), hot carcass weight (HCW), dressing percentage (DRESS), marbling score (MARB), fat thickness (FAT), and ribeye area (REA). Health outcomes included treatment for BRDC (RTX), death due to BRDC (RD), being diagnosed with chronic BRDC (RC), and dying after treatment for BRDC (RCF). A causal diagram was used to inform model building for linear and logistic regression models.
Funk, Jenna, "The association between Whisper ® lung scores and feedlot performance in crossbred calves" (2020). Graduate Theses and Dissertations. 18128.