One of my girls appears to have an impacted crop. It's softball size and hard. I've never had to deal with this before. She's my anti-social hen too, so it's a bear to handle her. I don't know if I feel comfortable doing anything invasive but I have read to try giving them oil and massaging the crop a couple times a day. I'm going to try that. Is there anything else I should try and how long should I give it before I make the decision to cull? Thanks