All is well!!!! Just got back from the vet and Austin is doing GREAT!! No signs of cancer anywhere in his mouth!! I can't even begin to tell you how relieved I am. He goes back one more time at the end of September to see how he does off of the pred, and if it's still all clear then we just monitor him. He's pretty dopey right now from being sedated, but he'll just sleep it off. He did gain 3 pounds, but I'm ok with that and so is the vet.
So thank you all once again for all of the prayers, love and support over the past four months. I couldn't have done it alone. Aussie sends lots of kisses and wiggles to all of you!