I've never had a problem with Guinea hens and my other livestock.
It's never too late to start! I retired to homestead on the slopes of Mauna Loa, an active volcano. I relate snippets of my endeavor on my blog : www.kaufarmer.blogspot.com
If you two don't stop this rough-housing somebody is going to end up crying. Sit down and read this tiny ad:
change the world (for the better) with hands on permaculture