New here, what's wrong with chickens

[MCathey]

Hi. I have 8 chickens. Four of our chickens have dirty butts, the other four do not. (None of the Brahmas, only the brown chickens). They aren't missing feathers, all are eating and drinking fine, acting okay. I don't think I see any obvious signs of mites or lice, however I unused a photo of something that is SO tiny I'm not sure what it is.
We live in Portugal. It's not been damp here yet. I clean the coop weekly with Diatomacous earth, clean their waterers etc. Please help.

 

[nuthatched]

Did you feed them a little of lettuce or watery vegetables? Mine get like that if I'm too heavy handed with their vegetables

 

[CluckerFamily]

Did you feed them watermelon or cucumbers?

 

[Dottie the Chicken]

One of my chicken keeping friends noticed one of their birds had a dirty rear end. When she was cleaning she noticed small red dots moving around. She had mites.

 

[featheredplanets]

They may have just had some watery foods or they may need worming, it could also be vent gleet. You should wash their bums and trim the feathers around the vent. It won’t hurt to worm them too. See if it clears up after that.

Also, Diatomaceous Earth is completely useless for poultry. It’s a waste of money and can actually be harmful. Use a liquid or powder with Permethrin to effectively treat lice/mites.

 

[Hei 20]

Hi. I have 8 chickens. Four of our chickens have dirty butts, the other four do not. (None of the Brahmas, only the brown chickens). They aren't missing feathers, all are eating and drinking fine, acting okay. I don't think I see any obvious signs of mites or lice, however I unused a photo of something that is SO tiny I'm not sure what it is.
We live in Portugal. It's not been damp here yet. I clean the coop weekly with Diatomacous earth, clean their waterers etc. Please help. View attachment 2419669View attachment 2419673View attachment 2419674View attachment 2419675

I am sorry your chickens are going through that. You will find answers here.
And by the way, welcome.