Cruciate Ligament Injury
Joint stability in the stifle (or true knee) is maintained by 4 ligaments, which criss-cross over to give the knee support, flexibility and movement. A common injury, which occurs to, the joint, caused by sudden twist of the knee, slipping on surfaces, obesity, trauma, breed predisposition and general wear & tear.
Four grades of damage:
Grade 1: minimal tear or sprain of a ligament with a degree of internal bleeding
Grade 2: Partial tear of the ligament
Grade 3: Complete rupture of the ligament
Grade 4: Ligament tears and takes with it small pieces of bone