How old is your baby, Chinalee? You need to also have them look for Legg Perthes disease.
See here:
Legg Perthes Disease in Dogs | Canine Legg Perthes Information
The description of Legg Perthes sounds very bad, but don't be discouraged. Just like LP or a torn ligament, it is very fixable with surgery, and they tend to have an excellent outcome and go on to run, jump and play for the rest of their lives.