That's great that Demmy is more comfortable! You must be very relieved!

Be careful, though, because ACL tears can seem better after the swelling goes down, but the joint can remain unstable, letting the the menisci beat themselves to a pulp inside the joint, causing much more damage in the long run. Be SURE that the joint is stable before foregoing any further treatment. Hopefully that's what your vet feels based on your "doubts the ACL tear" statement.

Here's to good healng for Demmy! Is she on healing vacation or still working right now? Hopefully she's home resting and chewing on a greenie in the sun.