We have a hen (cuckoo maran approx. 2 years old) that appears to have all the symptoms of being egg bound. We are currently doing a warm water soak and she seems to be trying to push the egg out, but with no success yet. She's been soaking for 30 minutes and still appears to be working to try to get the egg out. How long should we leave her in the warm water bath? Are we on the right track? Thanks!!