Help Rubble the Great Dane

Update: I unfortunately had to put him down due to his levels getting higher. But I still need to pay off his balance at the vet Hi this is Rubble, I rescued him a few weeks ago ago. He is the most loving dog I’ve ever come across. He has always been so happy and given so much love. On Monday 9/18/23 he collapsed I rushed him to the Emergency Vet and he has very high Kidney levels the machine only measures up to 130 and his was above that and normal levels for a puppy are around 30. He spent the night there and on 9/20/23 I followed up with a regular vet. He has kidney failure and they don’t know why yet. Tomorrow 9/22/23 he has an ultrasound appointment. The bills are already over $4K and I’m trying to raise fund to be able to cover some of the up coming fees and hospital visits because he deserves a chance of surviving. Please share with everyone you may know.