Abstract: An adjustable splint assembly for use in immobilizing the leg of an animal, such as a dog includes an elongated sleeve portion having a plurality of taping clips extending outwardly from opposing sides thereof, and a shaft portion slidably received within the sleeve portion such that the shaft portion and the sleeve portion are telescopically adjustable. The sleeve portion including a plurality of a set screws that extend through the sleeve to selectively engaging the shaft portion to selectively secure the shaft portion relative to the sleeve portion. In use, it is preferable to link together at least two of the splint assemblies together. In this regard, the opposing ends of the splint assembly (one on the shaft portion and one on the sleeve portion) have complementary pivot connectors such that the sleeve portion of a first splint is releasably and pivotably connectable to the shaft portion of second splint.