Sorry you had to make such a hard choice but for the animal its best time comes when we can only do what is best for them tis the greatest gift one can give anohter to end their suffering in a humane manner when they no longer can deal with life and will just linger and suffer. Me and jo had to do the same with two of our cats she had for more then fifteen years a couple of years ago so we know what your going thru.Our prayers are with you in this hard time.