I am so sorry for your loss. Your baby was well loved.
He is now pain free and playing with all the other babies
Liver Shunt is so common in the Yorkie breed (actually there are lots and lots of LS babies here on Yorkietalk). With surgery to close the shunt, and then a proper low protein diet and supplements, they can live a *somewhat* normal life. But there are some that are just more severe cases and it sounds like Tucker got too sick too quickly....Again, I am so sorry and I do hope that your pain and sadness with heal over time. You are a wonderful Momma and you and Tucker were meant to be a family (even if it was only for a short time - he loves you dearly

)
-Nicole