The most diffecult thing to do is that sometimes you should let love ones go, if it's a animal or a human it does not matter. When they suffer, let them die. I know it's a hard thing to do and almost or not possible, you should fine the strength and let them go. To me personaly I have a harder time of letting go of an animal than a human (I have been hurt alot by humans too a point that I have lost trust in the humanrace) I know this with mine onw experions. This May it will be 19 years that I lost Ernie and even now I cry like it just happend.