Lameness, activity time-budgets, and estrus expression in dairy cattle

Area of Science:

• Animal Behavior
• Veterinary Science
• Dairy Science

Background:

• Lameness is a significant welfare issue in dairy cows.
• Estrus expression is crucial for successful artificial insemination and herd reproductive efficiency.
• Understanding behavioral changes associated with lameness is vital for dairy management.

Purpose of the Study:

• To identify specific behavioral patterns contributing to reduced estrus expression in lame cows.
• To investigate the impact of lameness on daily activity budgets, sexual behavior, and feeding activities.

Main Methods:

• Behavioral scan and focal sampling techniques were employed.
• 59 postpartum milking cows were monitored for 5 days post-estrus synchronization.
• Lameness status was assessed, and behavioral data were collected.

Main Results:

• Lame cows spent less time standing/walking and more time lying down compared to non-lame cows.
• Estrus behavior was less frequent in lame cows, particularly in the early morning.
• Lameness was associated with a slower bite rate at pasture and lower body condition score.

Conclusions:

• Lame cows exhibit altered activity budgets, with increased lying time and reduced standing/walking.
• Diminished estrus expression in lame cows is linked to these behavioral changes.
• Management strategies should consider the impact of lameness on cow behavior and reproduction.