<human>: Can you provide a brief overview of the text?

Hi r/dogs . Our 3 year old mastiff mix is scheduled to go in for TPLO surgery tomorrow morning. The professional advice we have been given is that because our dog is large (~110lb), TPLO is the only knee surgery they really recommend. We've done a fair bit of research and have found everything from "We are so glad we had this surgery for our pooch!" to, "It's not a proven solution/they can heal without surgery/the surgeons just want to gouge you for maximum $$!".

The extra kicker is our poor girl has bi-lateral cruciate ligament ruptures so they are suggesting we will need to do the second knee once the first is healed. The second knee is considered "chronic" now as our previous vet had told us over a year ago that her limp was due to hip dysplasia and had us medicating; meanwhile, it would seem it was the knee joint which was wearing down all along. The first knee ruptured more recently, likely due in part to compensating for the other. But I digress...

It's more expensive than any pet surgery either of our families have experienced and so our families are skeptical of our decision to proceed, mainly worried about the financial burden on us as well as the difficult surgical recovery time. Of course we would rather not go through it all, but this dog is part of our family and we want to give her the best possible quality of life.
<bot>: mastiff mix scheduled for surgery; worried owner has been reading too much internet; looking for any input from a fellow big dog lover