Hi everybody, this is my first post so I hope I’m posting at the right place!
My bunny is 6,5 years old and has never had any troubles (knock on wood), he was neutered as soon as it was possible and there have never been in any issues. However, I got a bit worried today as I was trying to clear away some fur from is bum, and I found these weird brown things that looked almost like small seeds inside these weird openings that I’ve never really noticed before… It doesn’t look painful and he certainly doesn’t seem in pain or anything, but he displayed some discomfort when I poked around there… I’m adding a picture to see if it might help, but I’ve never heard about anything like it! By the way, it doesn’t seem like the brown seed-like things are poop, which I thought it was first… It’s very hard to explain…
I’m thinking about going to the vet to check it out, but before I call for an appointment (which I can’t do until tomorrow anyway) I thought I might see if anyone has any ideas? 
(Sorry if the pictures are weird, something happened when I uploaded them?)