How do you know if a hen has a yeast infection? She has had a pasty white butt for a couple of week snow, i brought her to the vets 2 weeks ago. They thought she had an egg stuck, washed her up and removed one with a soft shell? Sinse when she has continued with the pasty raw looking butt, has not laid any eggs . Its not lice, nothing is moving around near her vent. Also all my other birds are fine. Ive given her electrolytes, kept her out of the light, seperated her from the flock. Now Ive been giving her yogurt for a few days. She walks around in the barn and acts fine but she wont go out side anymore. Im trying to figure out what is wrong...any help or suggestions? do you think its a yeast infection? What else can I do to treat her.