{{{HUG}}} I know it is hard and heartbreaking. You made the right choice of giving her a wonderful home with wonderful new parents that will love her. Sometimes people and their pets are not the perfect fit, so you need to be strong and acknowledge that and find her a new home that will be a good match. I think you've done that and you should be proud of yourself for being loving and caring enough to recognise that things weren't perfect for Waffles or your family. You've done a good, brave thing!