I am so sorry to hear of your loss of your sweet Baxter. Many years ago I lost a kitty in a very similiar way. I left on a Sunday morning, and when I returned home 3 hours later, his hind legs did not work.
I rushed him to the ER which determined a saddle thrombosis. I had to put him down immediately. So yes, i agree, Baxter did go the quickest and most humane way of all.
You gave Baxter a life of unconditional love and that is the very best we can do for our fur babies.
Love and kitty kisses,
Jordan and Sheba
[Non-text portions of this message have been removed]