Maddie is a retired breeder. She apperantly had no maternal instinct and only had 1 pup both times she had a litter. Her owner Tracy knew that she'd be better off in a home where she could get more attention, and that's why we have her today. I know that Tracy loved (and still loves) Maddie very, very much. and I believe she proved that by seeing over her own feelings, and doing what was best for Maddie.
Now. When people rehome dogs because they don't like their coloring, size, or they aren't trained I want to hit them across the head. That's no reason to put that kind of stress on a dog. However I also think there are exceptions to this. We used to have a black lab named Shadow who really was the sweetest dog. But he was psychotic or something. he litteraly ate the couch. I was still really young, and my parents didnt have enough attention/energy to care for him. So now he lives on a farm with another dog just like him and a nice lady.
But (sorry I got a bit off topic) yeah. i don't think people should rehome dogs just because they're bigger than they wanted, they dont like their coloring, or something like that.