I took my dog to the vet with a sore toe nail. Ended up having to knock him out and pull the nail -- AND when they were in there found out it was actually BROKEN so had to cut his first little knuckle off his little toe! We weren't even going to bother taking him because he had stopped limping etc!! The vet warned me that toe nail injuries often get overlooked by people but they can be very very dangerous and should ALWAYS get it looked it. Apparently they get infected extremely easily and if that infection spreads to the bone, whole toes or whole paws can be damaged -- or amputated!!!! So, always get them checked out! Thought I would just let you know! It was news to me!