We've had Darby for almost 4 years now. He has always been very black and shiny. I noticed a few months ago that while his coat is still shiny and healthy looking, it's starting to turn brown! It's sort of like it's bleaching out. He's outside a fair amount but no longer than he has been for the last 3 summers so I'm not sure what is causing this. It's just really weird and I've never had a dog do this before. He's almost starting to look brindle.