It's sad to hear about dogs losing their life from falling through the ice. There is something that will save a dog in this situation, their dew claws! They do have a purpose. If you have a pond and live in a northern climate find a breeder that doesn't remove them before purchasing a puppy. It's becoming more common for reputable breeders to leave the front dew claws on as we are finding out there are downsides to removing them. Don't buy the excuse that dew claws are often ripped in the brush. Can it happen, yes, but it's not that common. You wouldn't have your thumbs removed in fear that you might injure or break them one day would you?
This video shows dogs with and without dew claws climbing out of water once they've fallen through.