Hey, I have a netherland dwarf who has one or two small patches of coarse fur. He has unlimited timothy hay and some fresh veggies daily with pellets. His water is filtered tap water. Is it possible for his fur to have just dried out or is it dietary? I've been watching him closely for the past couple of days and he's not acting strange, so I don't think he's sick and he's not shedding any fur. Is this just something that happens? Do I need to put anything in his fur to make it better?