This used to be in the earlier versions of Niche. Basically when your creature aged the fur would start to darken, not very noticeably at first but over time you could see a change in the fur color. Perhaps if the fur color changing isn't liked you could have an option to turn it off in settings. Also, it also doesn't have to be fur color changing, it could be like your creature slowly changes posture over time or the fur gets messy as they age. Just a little thought that popped up in my mind, t