Depends on the dog. If the CCL is ruptured, the dog can not stop the drawer test. My Vet and I were able to elicit a drawer test on my Rott with no sedation or analgesics. She had gone completely lame at this point though. Her initial rupture was trauma related. She started with intermittent lameness on the other side before her full second rupture. I treated it as a muscle pull and just rested her, but was wrong. Now I have a great working dog that is completely lame and retired. She gets around well, but still wants desperately to work, but it is too much for her to physically handle.