Vent area

[Feliciaschickens]

Hello! Anyone have advice on what this is? I’m hoping not mites but based on the pictures online it might be? My chickens are really old, they have some feather loss around the vent already. (I got them from my grandparents and my grandma can’t even remember how old they are) I don’t even think this one has been laying any eggs for some time now. The possibility of mites gives me anxiety! Would appreciate any comments. I recently cleaned a dirty vent on my other red hen and she didn’t have anything that looked like this. I haven’t seen any bugs either.

 

[nuthatched]

Can you please get closer pictures?

 

[Feliciaschickens]

Ok I don’t have a closer picture but I did confirm it is lice! I clearly saw the eggs and live lice as I inspected further. What do I buy to spray on them?