I gotta agree with V on this one. That was a beautiful story! I didn't want to quote the whole thing again, lol.
For some reason your story made me think of the foster families out there who take in these little ones, love them and give them a home, often nursing them back to health, potty training them, etc., only to know right from the beginning that they will be sending them away.
I give them a LOT of credit because I don't think I could do that. Bernie's fosters have been awesome, and I keep them updated with pics and stories of his adventures. One week I got a little lazy, and they called to check on him, lol.
Why didn't they keep him? Because they know there's another one out there who needs a chance just like he did, and they CAN'T keep them all.
There are many people out there, quality breeders, show dog homes, foster homes, etc., who go into relationships with their dogs KNOWING full well that they are temporary. (whether for a few months or many years). I gotta give them credit for doing wonderful things for these animals (whether it's improving the breed or giving them a second chance in life) then they make the loving choice to send them to a loving family.
I know it's got to be hardest on the breeders who spend years with the animal and often raise him or her from a pup.
Anyway, I could babble about this all day...