White bugs with black spot infestation

[morsekathan]

My daughter's chickens have some sort of pest - they are visible in their vents - white bugs with a black spot in the middle. Any ideas? Most of her hens (20 or so) have them.

 

[CluckyCharms]

sounds like chicken lice from your description of appearance

How to be rid of them if that's what they are:

https://www.backyardchickens.com/t/671900/chicken-lice