No words can possibly express my deepest condolences to you.......I too had the fear this would happen. We all do. If we didn't do the spaying,neutering, we would have a whole different problem. So don't blame yourself....many many of us have had to make the decision to have our babies fixed. This is a terrible tragedy, and I hope that you can find some peace soon. Again, I can't say how very sorry I am - not even possible. Take care..........