Determination of the relationship between hoof conformation characteristics and lameness in sheep

The aim of this study was to determine the hoof conformation characteristics in Norduz sheep through some morphometric measurements and lameness status through locomotion test and to reveal the relationships between lameness score and conformation characteristics. In addition, the presence of dermal inflammation was determined with an infrared camera. The animal material of the study consisted of 42 Norduz sheep in early lactation period. To determine the hoof conformation characteristics, the morphometric features of the inner and outer claws on the right and left, front and hind feet of each animal were determined by measurement. A 4-point scale was used for the locomotion test. A wide variation was detected in terms of right and left, front and back, inner and outer claws morphometric measurements. Research findings revealed that claw shapes show seasonal differences and that some claw types are associated with a tendency to the risk of limping. According to the locomotion test performed in March, April and May, the number of animals without lameness was 7, 6, 6, respectively; the number of animals with mild lameness was 23, 24, 20, respectively; and the number of animals determined to be moderately lame was 12, 12, 16, respectively. In addition, according to correlation analyses, it was determined that there were significant relationships between some parameters of hoof conformation characteristics and lameness scores. In conclusion, maintaining appropriate claw length, angle and width values in sheep can improve animal welfare and productivity by reducing the risk of lameness, which in turn can reduce operating costs and ensure sustainable production. Further research is needed to clarify the effects of different environmental and genetic factors on hoof conformation characteristics in sheep.