I do not have any experience with owls and their hunting habits, nor
do I know for certain that I have ever lost any Guineas to owls. My
Guineas are strictly free range and roost in a chosen oak tree or 2
every night. Other than knowing owls hunt at night, I don't know much
else about them. But here's an owl experience of mine....
Sometime last weekend I think, I spotted and heard an owl wayyyy up in
a BIG TALL pine tree at dusk, he was hooting, I could see his
silhouette and my Guineas were very restless and being noisy in their
roosting tree. I am pretty sure they knew he was stalking them, they
get noisy on occasion after dark, and sometimes they do the "Guinea
Chant" all night long for unknown reasons. I always go scout around
with a flashlight, but never see anything. This just happened to be
the first time I actually saw anything that might be the reason for
the constant chanting. he owl was about the size of one of my male
Guineas, so I am sure he could have easily killed one or more of my
flock if he was indeed actually after them. So to avoid any Guinea
losses, I went and grabbed the shotgun and blasted a shot in the owl's
direction. I heard the rabbit and squirrel shot hitting the tree and
away the owl flew. Hopefully he got the hint that my ranch is a no
hunting zone. After that the Guineas were quiet the rest of the night,
and they were all accounted for the next morning. Too bad for Mr Owl!