Rash around vent...has anyone seen this?

[Wilderre]

I noticed one of my barred rocks has small blisters around a reddish vent. She's eating 17% protein layer crumbles and got some meal worms, herbs, and scrambled eggs occasionally throughout the week as well. I've seen irritation before but not the blisters, so I wonder if anyone else has seen this and if I should put something on it. She acts completely normal...no other symptoms.

 

[Wyorp Rock]

I have seen others ask about something similar, but don't recall getting any clear answers.

I wonder if it could be something like a heat rash. It wouldn't hurt to apply a mild ointment or cream like Hen Healer, raw honey or coconut oil to see if that helps.

 

[Wilderre]

Thank you! I have all of those.