White line disease (WLD) is one of the most important diseases among cow’s lameness causes. This current study was done during a nine month period in a dairy herd with 2000 milking cows. Hoof trimming and inspections were done in a regular basis by expert trained hoof trimmers. Gait of the cows scored by a five point scoring system on a monthly basis. When a WLD were recorded, each month after recording the lesion visited by a veterinarian and the lesion revealed treated when a layer of new horny tissue covered the white line area. Treatment was done by removing the horny tissue around the lesion and elevating affected digit by using a wooden block on its contra sound digit. Total of 38 WLD were recorded, as 19 (50%) in front feet and 19 (50%) in rear feet. The average treatment time was recorded as 33.54 ± 18.86 days that ranged from 20 to 106 days. Seventy three (73.68) percent of cows detected as treated at the first month after treatment, 15.79% at the second and 2.64% at the third month after treatment. Seven (7.89) percent of cows remained untreated. Locomotion scores of the cows were increased from three month before recording (2.23 ± 1.23), reach to the highest amount at the month of lesion (3.5 ± 1.45) detection, and decrease till three month afterward (2 ± .03) (p<0.05). The average days in milk in affected cows was 221 and treatment was more successful in cows with days in milk 300 and higher (p<0.05). Sixty five (65) percent of affected cow were pregnant which 38.5% of them cured at the first month after treatment and 35% of affected cows were nonepregnant which 57% of them cured at the first month after treatment. No significant changes were recorded in milk production three months before to three months after detection of the lesion. Results show possible earlier detection of the lesion by locomotion scoring and negative effect of the pregnancy on cure rate of the lesions. Recorded duration of the treatment is less than other claw horn lesions like sole ulcer.

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