Please please help my girl Felix and her broken leg

My name is Sam and my partner is Sophie.

We live in the Hobart area and have had our 3 1/2 year old girl Felix for just over a year now. 6 days ago she went missing, and we were incredibly distraught and worried. Today we found her but she was badly injured. After an xray we have discovered she has a badly broken femur that will require surgery, even an amputation will cost thousands of dollars which we can unfortunately not afford.

Felix is our entire world and we would do anything to keep her. We only just found her again, please help us not to lose our baby girl. Any help would be forever appreciated