Effects of feeding level, milking frequency, and single injection of cabergoline on feed intake, milk yield, milk leakage, and clinical udder characteristics during dry-off in dairy cows

Abrupt and gradual dry-off strategies by reducing feeding level (normal vs. reduced energy density), milking frequency (twice once daily), administration of a dopamine agonist after last (i.m. saline cabergoline injection) were investigated (2 × 2 factorial arrangement) for their effects on feed intake, milk yield, balance, leakage, clinical udder characteristics in 119 Holstein cows. In the week before dry-off, cows assigned to 1 4 combinations frequency. Within 3 h milking, injected with either or (cabergoline; Velactis, Ceva Santé Animale; labeled use only abrupt i.e., no preceding reduction milking). After all fed same diet dry cows, data collection continued week. Dry matter intake (DMI) was recorded automated bins yield an automatic system where additional concentrate fed. Clinical leakage scored 10 times during dry-off. Before total DMI decreased compared normal level, but did not differ between frequencies. The combined effect concentration resulted 47% lower net Milk approximately 30% when change frequency, whereas 45% both reduced. balance negative more twice-daily milking. engorgement treatments Cabergoline injection least signs 48 h, also lasting 24 irrespective treatment conclusion, cessation lactation daily without high-yielding dairy inducing period contrast, induced which may compromise welfare due metabolic stress hunger. No clear differences risk observed management strategies. Use led fewer first days positively affect at However, mechanism behind consequences concomitant decrease needs further investigation complete our understanding