I have two roosters, and their rear ends are sick. I think it's candidiasis. Today I gave them apple cider vinegar, 15 ml in a gallon of water. I gave them oatmeal with coconut oil and in the afternoon half a garlic clove. I washed them with antibacterial soap and removed the scab they had. They look red and swollen. The roosters look very good, they eat well, their poop looks normal and they are active. I realized this because I take them out daily so they can run and eat grass and I always check to make sure they are okay.