Saving TItan

Titans kidneys are failing! This is the 4th case in 2 weeks the vet has seen and is stumped as to how or why this is happening! He is only 2 years old and has his whole life ahead of him if/when he gets better! As of right now my bill is at $4000! I hate asking but I really could use some help! Every little bit will add up and be huge! Thank you very much!