Hi, I just treated my hen for flystrike. It was a nightmare but I seem to have it under control. Although now I notice that there is something coming out of my hen's vent. When she poops it comes out a little further, then retracts. Does anyone know what this is? If so, what should I do? The white stuff is ointment I applied for the flystrike. I'm referring to the flap that looks like a wood shaving. Thank you