Aww poor Max, I'm so sorry to be reading this. I hope he feels better soon, and the surgery goes well. Please keep us posted. Sending love, hugs and prayers your way.
UPDATE::: Max saw the Orthopedic Vet specialist yesterday - Yes, it is his ACL and he most likely will require surgery - He will continue on the NSAIDS and PAIN MEDICATION for the next 2-3 weeks, and the Vet will re-evaluate him again in one month. If he has not improved, the surgery should be done - but the surgery will
cost $3600.00 - don't know yet if that is do-able financially. Will keep all of you posted. Thank you all for your care and concern for Maximus.