I am so sorry to hear of Daenerys and Gilly's mysterious passings. It does sound like a possible issue with genetics. RIP, little ones.
I am glad that you gave Princess Peggy a loving, forever home with you. I hope that the two of you have a marvelous time together and she is with you for a long time. I look forward to getting to know her and seeing pics of your little princess whenever she is settled in more. Congrats again to you both!!!!