*hugs* You do an amazing job with them, they clearly feel too loved and dont want to ever leave!
You have saved butterfly from PTS, given him a wonderful life with you where he could recover and feel happy and safe, I know that because he clearly loves you very very much. You have helped Snowy recover from sore teeth and stabilised her weight and she too is now a happy healthy bun who's muscle tone is improving so she can lead a normal bunny life. You've given her love and cuddles and all the herbs she can eat, she will never ever forget all that. Just because it turns out she is a bit pushy, maybe she just wants people cuddles instead, she is a very people bunny. Butterfly can now have a friend, and hopefully a home, thanks to everything you've done. You have made these foster bunnies very happy, I dont think you could have done anything better than that.