Oh gosh, I am so, so sorry for what happened to your precious Ziggy. I can only imagine the pain you must be going through right now. Please don't blame yourself, you couldn't forsee what was going to happen and many cats that did have their claws have been killed by dogs.

I would definitely call animal control and report what happened and I pray that they do something about it, so this doesn't happen to someone else's beloved pet.

Your Ziggy was very lucky to have shared such wonderful moments with you.
May the loving memories comfort you and help you overcome the pain.

Rest in Peace sweet Ziggy.

((((((HUGS)))))) for you Court.