I’ll start by saying my rabbits are all outdoors. I noticed this small black patch on one of my rabbits nose a couple weeks ago at that time it was much smaller than it is now and I assumed it was mud or dirt from burrowing. Fast forward a couple weeks the spot is much darker and bigger (as pictured) so I decided to investigate it further. The black patch appears to be a possibly what I am assuming to be a bunch of fleas imbedded in my rabbits skin? When I tried to wipe it off it started to move a little and I noticed some things crawling around it. Has anyone else seen this before or have any idea what it is or how to treat it???