You are SO LUCKY that the way they treat this these days is so easy and effortless! And so is your daughter.
Forty-four years ago, I was diagnosed with 100% total congenital hip dysplasia. I had no ball, just the socket; the ball had to be naturally made (that is, my body had to be put into a position so that it could form the ball naturally on its own).
I spent a few months at Children's Hospital in Minneapolis in traction. Then I was put into a full body cast from the nipples down, with an opening for front/back body wastes. Those casts had to be "sawed" off me every couple of months and a new one put on while my little body grew. At 1.5 years old, I was out of the casts and into a leg spreader brace. Finally got to toilet train, learn to walk and run, and get around like other little kids. Then at the age of 2 years old, my body was growing too fast for my hip sockets to keep up and I had to go BACK into a full body cast. I hated it! I had learned how to walk and go to the bathroom on a toilet and I didn't want to be a baby! My parents didn't get any sleep for a week while I screamed my anger. But after that round of casts (about 6 months) and then the leg spreader brace again for a number of months, I can walk nowadays with no ill effects.
If I hadn't been born in 1968--when they first knew how to help babies born with this affliction--I would be wheelchair bound today and unable to walk. I thank my parents for going through the agony and the heartache and the love of letting the orthopedic specialist do what he needed to do, because for me, it was considered an "experimental procedure" back then.
I was so surprised and so very, very happy to hear what is done for babies born with hip dysplasia today and how much easier it is on both the baby and the parents. It makes me very happy to know that the treatment has progressed to the point where it's a very easy treatment that is 100% effective.
You'll get through this point in your daughter's life and when you look back, it will all be just a hazy memory. But you'll have a daughter who can walk and run and skip and dance--and that's the most important thing.
Hang in there. It won't be that long before you're done with this phase in her life.