Save Neptune: Urgent Medical Help Needed

I rescued this stray the other day, and he is the sweetest little fur baby ever. He has never gotten aggressive with me and is such a cuddler.

Unfortunately, I noticed a problem soon after. He is bleeding from his mouth. The doctors are not quite sure what all is wrong because the tests look fine, but that’s the scariest part according to them. There are prospects of it being rat poisoning or leukemia.

I would love to be the final home for this loving stray, I named him Neptune! However, the medical costs are extremely unexpected, so I would appreciate any help that the public can provide.