Neptune’s medical bill

Hi friends, Cece and Neptune here!
Last night Neptune went out to play like his usual rebel self, but this morning I found him laying in the back yard unable to move with little cuts all over, I’m guessing he fell on his left leg while playing or was attacked by other neighborhood animals  :(  he haven’t been able to use his leg and I’m trying my best to make him comfortable and help him get back on his feet. 

UPDATE We just saw the doctor and they said that they don’t know what’s wrong with him, Neptune is going to be hospitalized for 48 hours so they can run tests and monitored him to see what’s wrong. Without treatment  just with 48hr monitoring fee and test fee it has come up to about 4000 dollars.
please lend us any help you can.  Thank you for taking the time to read this. 
With much love, Cece and Neptune