Figure 3. Summary of mean starter intake (A), ruminal pH (B), total ruminal short-chain FA (C), ruminal butyrate (D), blood
β-hydroxybutyrate (E), and fecal starch % (F) from calves weaned at 6 wk (dotted line) or 8 wk (solid line) on d 35, 49, and 56 of life. *Weekly
means between 6-wk calves and 8-wk calves are different (P < 0.05). Age of weaning and week of life interactions (A × W) that are different
are indicated on graphs.