(((Ellen)))
My Dakota was pet shop puppy and although I had many problems with his behavior, I was lucky that he was never seriously ill all the years I had him. He never did crate train, he hated the crate and would poop and pee in it and when I got home would be sitting in the corner giving me a "see what you made me do" look. With all the problems I had with him, I loved him like crazy and he gave me years of joy that I will never regret.
I learned after getting him about puppy mills and have since gotten all my dogs from breeders. I also try to educate as many people as possible as to where pet store puppies come from and tell them to get breeder referrals from the parent breed club. Sometimes they listen, sometimes, they don't.
I too agree that you should get Trixie's blood tested, then you will know one way or another. Hopefully she will show as a carrier or even clear and you can rest easy. Before this test was available no one knew what they were breeding, now, luckily they do. Apache came back as Probably Affected and I will be devastated when and if he starts spilling, but it won't be a surprise and whatever happens, we'll deal with it. Remember that there is a great protocol out there and many dogs do very well on it.
Most of all, just do what you're doing and love that little girl of yours….each day with them is a blessing.