Here's what I suggest you do so we can better help you assess the state of Butter's health. Take a few photos of her going about her business. Get a closeup of her eyes and comb as she is loafing. If you have the means, a video of her walking would be very informative. Get a shot of her from behind and coming toward you.
I hope these pictures and videos will help y’all in guiding me.
Here are a couple of head shots
(she has dried mash on her beak),
frontal and rear shots, along with a poop shot.
Her eyes and nares appear clear. I’ve never noticed anything out of the ordinary. She is a carrier of Fowl Pox. Her comb and wattles are a nice red. Feathers are glossy.
This butt, though! It’s huge!

She comes by it honestly, I suppose, and takes after me.

Bless her heart.
This shot from the droppings board is a bit disturbing. Her poop is the big, loose blob with the albumen looking mess to the side.
This video shows Butter from the front. She is the darkest of the BO and is the one running out in front of the others.
Here she is from behind. She does have a waddle to her.
And this last video is confusing to me. My intention was to capture her breathing, however, it captures her shaking her head. She seemed puzzled with my phone right in her face, but that doesn’t account for the head shaking. She has shaken her head on occasion, but not to this extent.
Thanks to everyone viewing this and for your responses.