I'm sorry to hear that Sunny's surgery has been cancelled but it does sound like it will be in her best interest to wait. I hope her development will continue normally so she will not need the corrective surgery later on and will only need to be spayed afterward.
I'm sure glad she went to a good PT home because who knows if she would have gotten the wonderful care that you provide for her if she were with someone else.
Prayers going out that she will not need corrective surgery and that she will grow up to be a strong healthy dog.
p.s. I thought your poem was great!