Investigation of an outbreak of physitis in calves
This report discusses the investigation into a complaint of "swollen feet" in heifers on a large dairy farm. On physical examination, a diagnosis of physitis was made. Approximately 90% of the heifers aged 4-14 months were affected, with the 10-12 month-old heifers most severely affected. Nutritional causes of physitis were investigated. Vitamin D overdose was suspected, so hyena disease and hypervitaminosis D were also investigated. Ultimately, TMR analyses showed a calcium excess and an elevated Ca:P ratio of 4:1, which were identified as the likely causes of physitis.
Senior seminar paperSeminar SF610.1 2007 W45
Cattle -- Diseases -- Nutritional aspects