Bone biopsy possible chemo

My sweet baby Moo has had issues with his back leg and doctors are having problems getting to the root of it but now have settled on possible bone cancer. His bones are disintegrating and swelling and he has no mobility in that leg. He needs an urgent bone biopsy to figure out what kind of cancer it is and possible treatments. My Moo Bear is my life, best friend and my baby. This is so beyond hard for both of us and I’m not one to ask for help but he needs everything I have to give and anything your willing to give. Anything helps and if you can I appreciate to my core every single penny.