
You're right, as it's only a partial tear then it's too soon to go to surgery (unless the dog is very large or overweight). Small tears take a
long time to repair; your dog will probably need a minimum of 6 to 8 weeks strict cage rest - on the lead out to toilet and that's all the exercise he can have - but that's the same for cruciate surgery recovery, so either way a knee support would probably just be uncomfortable and could affect the blood supply to the leg when he's lying down.