Hardest thing I've ever had to do
Since now I have totally moved out of my apartment (a temporary situation) into a place that doesn't allow cats, I was forced into giving up my 12 year old cat, Spaz, whom I've had since he was a kitten. We do develop an emotional attachment to our pets which is difficult to undo.
This morning I took him to the Lowell Humane Society, where they told me they'd do their best to find him another home. Much will depend on how he adjusts to this new environment of basically living in a cage. They may end up putting him to sleep but I'll never know if they will or not.
Ideally, I'll be back in a place real soon that allows cats so that I might be able to get my cat back by re-adopting him. I doubt it, though, but never do you know.
An unanticipated difficulty that I ran into while trying to find him a home is that most no-kill shelters will not take cats older than eight years old, due to their readjustment problems.
My ex, after badgering from V and M, reluctantly took back the younger cat, Shadow.