Oh Scooter!

Yes, I've had that happen. Seems to start if I clip their nails too TOO short. Then the whole piece grows, as I've clipped off the part which grows narrower and narrower. For my crew, it is the dew claw this happens. It ends up looking like a dime size of nail, not a claw at all!

Watch what the vet does, you CAN repair this at home in future.