Most of our rats have come from feeder bins, since our pet shop closed we have adopted from a breeder who breeds an amazing strain of healthy and friendly rat he developed himself... but his rat breeding hobby mostly supports his snake breeding hobby.
Whenever we adopt a rat we pick and choose from many and it's hard when I think of what's going to happen to the rats we don't adopt... I can still see their cute little faces as we left them behind and it breaks my heart every time I think about it.
But we do our very best to give the rats we adopt a good home and an amazing life. Perhaps I'm a little bit older than you, but at some time you realize that life isn't a game you can win. We all have to die in the end, and most fancy rats are going to live short lives that end tragically, but we can make the best of our lives and we can save a few rats along the way. Like pinball, life is a game you are eventually going to lose, so the best you can do is to set a high score... Just count the rats you save, not the ones you can't.
Theoretically every football team could score over 100 points a game, although I've never seen it happen, but most teams are happy if they win 6 to 3... You choose how you keep score, so find a way that makes you happier not sadder.