I'm so, so sorry you've lost Giney. I know you were trying to get him well, and it seems he decided it was his time to rest. He certainly was an adorable little boy.
Go and meet all your new friends at the Rainbow Bridge, Giney. Run through the grass, bask in the sun, and eat whatever your little heart desires. Your human will come and find you when it's time again to take you home.
Rest in peace, Giney.