Yellow spot under chickens butt / belly

[Mmsorg]

looking for some help and advice for my speckled Sussex hen. I noticed she was picking some of her feathers under her butt and was missing a good amount. I checked her for mites and treated her using diamtonatiois earth just incase it was mites. But I saw nothing and the rest of her looked a healthy as could be. She’s also still laying and none of my other flock is showing signs of mites.

Can anyone help me figure out what’s going on?

 

[azygous]

I would bet real American money that's a feather cyst. You will be required to do minor surgery to release the pus and the ingrown feather shaft. Look at the lump very closely. You will see a slightly darker area. That is where you will make a shallow incision. Then exert very gentle pressure around it and the follicle should pop out. It will look curled. Take a toothpick and coax the follicle to unfold. Then squeeze out any remaining pus and clean well with soap and water or Betadine. Then dab some wound ointment on it.

 

[nuthatched]

Looks like a cyst. Please don't use diatomaceous earth on your birds, it doesn't work well and cause respiratory problems for you and your birds.

 

[Mmsorg]

I would bet real American money that's a feather cyst. You will be required to do minor surgery to release the pus and the ingrown feather shaft. Look at the lump very closely. You will see a slightly darker area. That is where you will make a shallow incision. Then exert very gentle pressure around it and the follicle should pop out. It will look curled. Take a toothpick and coax the follicle to unfold. Then squeeze out any remaining pus and clean well with soap and water or Betadine. Then dab some wound ointment on it.

Thank you so much! That would make sense bc she just finished molting