This is a picture of luna's paw, it's kinda unclear but I took this when I noticed, it kinda looks like a yin-yang symbol. the white dot in the dark part is hard to spot on the pic
Another picture:
neither picture is edited, just different lighting. but if this isn't a sign, i don't know what is
Another picture:
neither picture is edited, just different lighting. but if this isn't a sign, i don't know what is