Black stuff in bunny fur
I've tried finding anything I can regarding this, but no luck.
Anyways, in the last couple days i've noticed black stuff in my bunny's fur. It looks sort of like dander, except it's somewhat hard and thicker. Basically, it looks like black sand but slightly larger. Anyways, it doesn't seem to bother him, but I have no idea what it is so I'm worried. He's a golden brown color and 2 years, and this is the first I've ever seen this while brushing him.
Does anyone have any idea what this is or if I should be worried? He's up for a vet visit in a few weeks, but i'm wondering if I should wait til then or if this needs attention now.
Thanks in advance.