/b/veterinary-news/posts/farm-vets-walk-26-000-miles-for-farm-africa A group of 100 farm vets and staff from Merial Animal Health have walked over 26,000 miles, more than twice the length of the Great Wall of China, in a steps challenge that raises money for charity Farm Africa . The challenge is part of Merial’s #CALFMATTERSen-USTelligent Community 10