well, the way I look at it is, you made those animals last few hours on this Earth special by staying with them, telling them how much you loved them. you did what you can but Nature took it's course (sometimes via the Vet) and you gave them love. I know some people that can't have pets because the eventual loss and grief is too much for them. for me, it's part of the process and all of the happiness I get from having an animal far outweighs the negative eventuality of death. perhaps you need to take a break from pets, or perhaps you need to look at all the positives and length of happiness you get from them and concentrate on that. hang in there--you're not jinxed!