Downer Cow Syndrome (Recumbent cow syndrome)

Downer Cow Syndrome (DCS), also known as non‑ambulatory cow or recumbent cow syndrome, describes cattle—usually adult dairy cows—that remain in sternal recumbency for more than 12–24 hours and are unable to rise despite being alert and able to eat and drink. It is most commonly seen in periparturient and early‑lactation cows.

DCS is a major welfare and economic issue, with recovery rates generally below 50% due to progressive muscle and nerve damage.

Economic Impact

Downer cows result in losses from:

• Reduced milk yield
• Veterinary treatment
• Long-term welfare decline
• Cow mortality & culling