[jazzymom]

And neither is it realistic to think people will ever stop breeding because they can, or that they will stop buying animals in petstores. As long as we are being realistic. The over-population is due to those two things. So if as you say it will never end, you must agree that breeding & petstore sales will never end either.
Opinions vary, and none are 100% correct or realistic.
IMO it is better to care for an animal regardless of how it came to be. It had no say in it's creation. It is a living being, deserving of love and a home. We leave it to die in a petstore, so it won't be replaced with another?? It will always be replaced, upon being purchased, or death.