I have 6, 3 week old chicks. All 6 act fine eat, drink and run around. My RIR has a discharge coming out of her vent. The chicks are in a 3 by 6 brooder with a heating plate. They are eating medicated grower feed. They have been give the yolk from hard boiled eggs; and this week I started to offer chick grit other than that they have had no treats. Originally I had 2 chicks with pasty but including the RIR. The other chick is fine but the RIR has had a discharge for a week. I have attempted to put olive oil on it. All that seemed to happen with that was it caused her to peck at her vent. I soaked her in epson salt last night. Her poop looks normal so not sure what is causing the discharge. Any ideas what may be causing this and what I can do to help her?