2001 Volume 54 Issue 11 Pages 829-836
This study was designed to determine effects of trimming on hoof growth, hoof-disease occurrence, and beef productivity. Sixteen Japanese black steers (13.0±2.0 months of age, 308.0±30.8 kg in body weight) were divided into 4 groups: the no-trimming group and group 2; in which trimming was performed at 3-month intervals; group 3, in which trimming was performed at 6-month intervals; and group 4, in which trimming was performed at 12month-intervals. At 19-month intervals, hooves were measured and hoof appearance recorded.After slaughter, we made pathological investigations of hoof and joint diseases and obtained scores representing the quantity and quality of beef products. When trimming intervals were longer, hoof angle was smaller, and hoof wall and bulb height increased. The occurrence of hoof diseases in the no-trimming group was significantly higher (P<0.05) than in the other groups. Scores for beef-product quantity were significantly higher (P<0.05) in group 3, in which trimming was performed at 6-month intervals, than in the other groups. These results suggest that trimming may be useful in maintaining normal hoof growth and preventing deformation and disease.