One of my 6-month old Buff's has been acting rather odd the past day or two--wants to just roost, her feathers are ruffled. Her eyes are alert and bright. Today, I found the blades of grass coming out of her vent that she seems unable to pass. I tried gently to pull on them, but they didn't budge. I cut them off as other birds were pulling on them. No other pronounced symptoms, but I can't find anywhere that this is a normal occurance or not? Thanks for any help!