Help Koda's Kidneys

Koda has been my best friend sense the day I picked him up from the shelter 6 years ago. Koda has helped me get through so much; mental health issues, break-ups, dating, exploring new places and old with me, but he has effected people around him the most. He always lends a helping paw to my office when he visits, makes sure Orion The Roadcat is always loved and protected, and anyone will tell you he is full of love and joy. Unfortunaltly, Koda went into the vet yesterday with stage 4 kidney failure. This could be caused by either an infection or him ingesting something that caused the damage. After being admitted for one night his levels have improved and they are considering him at stage 3 now. They are going to continue antibodics and continue to treat this as an infection in his kidneys, but are continuing to test for other possibilitie causes. This is where I need to ask for your help, each day Koda is admitted will cost roughly $450/night. This does not including any extra tests that need to be done. He will have to be admitted for a few more days to really be able to make a recovery as well as medications. I am doing my best to keep up with the costs but I am exhausting all my options. I am begging for any help you can offer. He is the goodest boy and deserves all the help available to him.