WHAT? Rehoming I could understand...but you never "need" or "have" to put an older dog to sleep if it isn't sick!

I just don't understand that one AT ALL! She could have rehomed them...or dropped them at a shelter! at least given them a chance! How could she do that?! AND how could she talk about it without crying? Did she seem upset at all?
I can't even imagine. How selfish.