Hi Julie,
For either situation, I done once or twice daily with the 30C potency of the homeopathic. Keep in mind that it will be required for several months before the lameness completely resolves (ligaments heal slowly, but do definitely heal if they are not completely severed). So eventually you'll probably be looking at once daily use after the first several weeks have passed. While it takes a while for benefits to really rack up, the lameness should show some definite moderation after the first 3 to 4 weeks, but won't be anywhere near completely resolved. Lastly, remember that certain chiropractic issues can masquerade as an apparent cruciate tear. So a chiropractic evaluation is a good idea.
Hope the case goes well for you!
Steve