Table 3.
Multivariable linear regression model for drinking speed (mL/min) collected from an automated milk feeder in 103 preweaned dairy calves. Calves were enrolled in the study at 21 ± 6 (mean ± SD) d of age and underwent twice weekly health exams. The primary predictor of interest was Bovine Respiratory Disease (BRD) status. Drinking speed was analyzed for 3 d prior to, the d of, and 3 days after BRD detection. Estimates for drinking speed and reported p are from solutions for fixed effects.
| Variable | Drinking Speed Estimate (mL/min) | Standard Error | p |
|---|---|---|---|
| Intercept | 778.45 | 58.1 | <0.0001 |
| BRD Status | |||
| Clinical BRD (CBRD) | −156.3 | 65.1 | 0.02 |
| Subclinical BRD (SBRD) | −61.7 | 54.9 | 0.26 |
| Without BRD (NOBRD) | Referent | ||
| Breed | |||
| Holstein | 130.9 | 43.2 | 0.003 |
| Jersey | Referent |