When a calf is born with a contracted flexor tendon, the fetlock jointis caused to knuckle under, causing serious limitation to the mobilityof the calf. The BOS splint is applied to the back of the leg, with thesplint bottom edge at ground level. With application of the splint thecalf should have normal mobility immediately. Remove the splint after4-5 days. Splint length 40cm o.a. NB: The BOS splint can be slightlymodified to suit the leg by use of a hot air gun. Be sure to note ´TOP´marking on splint.