Me neither.
When we first met Bryan and were talking about buying Jazzy, he brought up his "return policy" that if she developed health problems we could return her, etc.
I told him it wouldn't happen. Once they move into my house, from moment one..actually, from the moment they hit my arms, they are MINE FOREVER.
Of course, I'd tell him if a problem develops, but he ain't never gettin' these dogs back! LOL
I can't imagine not going through the whole life/death process with my dogs. Barring some unforeseen tragedy, they'll all die peacefully IN MY ARMS. {hopefully not all at the same time, LOL}. I could never abandon them because of illness or age.