Can't figure out if my rabbit has mites or something else?

Hi
I've got a baby bunny only had him 4 days. Today while I was stroking him I saw this tiny beetle looking thing in his fur.

Because it was near his ears I thought mites but. From what I've read it's impossible/very hard to see but this wasn't it was very
When I found it again it had tiny black dots that Didn't wanna come out.

Any ideas that could help roger? Thank you