Thank you for sharing Jack's story. I know it must have been so difficult to relive, and because you told it, maybe one more person will learn about CT and one less pup will go through Jack's struggle.
I had never heard of CT before I came to yorkietalk. I didn't know how important it was to use a choke free harness. I know these things now, and it very possibly has saved my dogs lives. I'm so thankful for people like you educating new small breed owners. Jack would be so proud of you for everything you did for him...taking him to see a specialist, changing your and his lifestyles, seeking the best vets, giving him the best life he could have with this terrible condition. You even gave him the most loving gift a human can give their dog. You were there in the end, that's all that matters, that's all Jack remembered. His momma whispering lovingly to him as he drifted into peaceful eternal sleep. Where he could breathe easy again.
Rest in peace, buddy.