Since your dogs are so large, I don't really think I'd take the chance on a T-Bone. I'm with Cloverleaf on this one...I've seen too many "bone" related emergencies at the vet office where I used to work. I would think weight bearing bones should be fine. The problem with smaller bones like the T-Bone and cooked bones is that they have the tendency to splinter. That's what can cause a lot of damage. Doesn't always happen (As you've seen from other posts) but the last thing you want on Christmas is to rush your dogs to the emergency vet due to internal bleeding from a bone!