Tinkerbell Hospital Bills

Tinkerbell has been with me for almost 13 yrs and she has just came very sick and can’t walk or hold her head up and they are wanting to do more test and keep her longer on IV to see if she will come around,
she needs more testing to see if she has cancer.
Hospital says by blood work looks like her kidneys are shutting down and she may cancer because white cells are up and she also has autoimmune disease.Bills are going to be more then I can afford to keep her on IV as long as hospital wants to.I want to try to keep my baby alive as long as I can,
I just loss my sister December 4th to kidney problems and I sure can’t handle another loss.
Can you please help Tinkerbell stay alive long as she can and be able to have the scans she needs to see if she has cancer etc.
So far bills her bill has been over $500.00  for one check up and one night stay with IV to try to get her to be able to walk and be stable and live a little longer.
Tinkerbell is my sidekick and I will be lost without her !!! 
Thank You  God Bless