Short answer? Let the surgeon should choose. Which one will give your dog the best chance at a normal life?
I agree with Doberkim 100%. My guy had the TTA procedure in January. Once we had decided on either TTA or TPLO, I left the choice up to the surgeon.
And please go to a board certified surgeon. Even though a non-board certified surgeon can perform these surgeries, the peace of mind is priceless! I also delayed making a surgery appointment until I checked out the surgeon's references...through vet friends, agility friends, other dog sport friends. Like I said, peace of mind.
That being said, recovery hasn't been easy on any of us. My boy is just 2 years old, is extremely active and we train in ob and agility. He has a lot of muscle wasting in the operated leg. He's also now started this weird thing where he kicks the knee out to the side when he walks. Xrays looked normal, everything seems to be right on schedule so maybe he's compensating for the lack of muscle.
Doberkim- do you know of any large size agility/ sport dogs that had this type of injury and went on to compete again?