So sorry you are going through this with your sweet Mackenzie!
I had the same situation several years ago with my Lab, Sable. My vet gave me the best advice at the time. He said think of Sable's three favorite things to do and when she could no longer do two of them, it was time for her to go.
Best wishes for you in this difficult time.
__________________ Susan  Max  Eli  Amelia |