Your news is so very sad - we were all so hoping that Lucy would pull through - it sounded like she was getting a little better. It is especially heartbreaking because she was so young and you had just brought her home. Although it might be difficult for you, perhaps in Lucy's memory, you might contact the breeder, as TossBranAbi suggested, to inform him/her to be aware of possible illness in Lucy's littermates. You did everything you could for your little one - I'm so sorry this happened to you and your family. Sending hugs and comforting thoughts. Godspeed, precious Lucy.