Oh my, we hope it is not the ACLs. No other symptoms? Any fever associated, like with Lymes? Seems strange that both would go. Why were the paws red? Just his gait? Cirra had an ACL partially torn last year in the snow banks. She had more trouble after Xray exam due to the force used in translating the joint under anesthesia. We could not bring ourselves to take her to NH for a TPLO at 13 months of age. She has been on conservative management for a year. So far so good!
Hoping your vet is experienced and knows that little force is needed to assess a truly torn ACL when the dog is under sedation. Are his knees swollen and/or hot?
?? Have you checked with your breeder about the incidence of ACL tears in Fumbs breed lines? Really would echo the need for second opinion, perhaps a holistic vet about the paw redness?? Just floating some ideas because the ACL seems quickly assumed for most rear leg limping in the giant breeds. The TPLO is what they recommend for dogs over 100 pound with a stifle angle greater than 30 degrees. It is MAJOR surgery, not without some serious potential repurcussions. Having been down this road, we wish you the best on Friday and hope Fumbs comes through the Xrays without problems. Thinking of the big guy!!