Translations:Basic Field Epi: Manual/594/en
- Some new cattle arrived 9 weeks ago
- The cows moved paddocks 9 weeks ago
- All the sick calves are between 6 and 8 weeks of age
- All the healthy calves are older than 10 weeks of age
- All the sick calves were born in a small yard that was very dirty
- All the healthy calves were born in clean grass paddocks