Running a closed flock can have its challenges, but the health benefits more than outweigh the problems, writes Jeremy Hunt. Monitoring ewe health and performance by running a closed flock can bring long-term benefits, however maintaining adequate genetic diversity remains a major challenge. Six years ago West Country sheep breeder George Cullimore decided to change his sheep enterprise from running about 500 commercial ewes to establishing a closed flock of 120 Lleyns – and he’s convinced the health benefits he’s […]