Here is a photo. Sorry, I rotated it but it still uploaded this way. :/
I took him to the vet because his limping got worse after I made this thread. The vet agreed his nail was odd but he was more concerned about his knee on his limping leg which he found swollen. They took hip, paw and knee X-rays. I am waiting for the results. I'm hoping it's nothing serious. For now he is on anti inflammatory medicine and restricted activity. I had to carry him up the stairs so I don't think restricting his activities will be difficult. .