[svandamme]

I think they probably can, but you'de need some very very big owls to take on a full grown house cat without risk to the owl.

In the wild. Predators generally won't attack if the ROI isn't good
Why go for risky cat when there are safer rodents a plenty?

We have Ohoe's here, pretty big, 6 feet wingspan.. but they weight less then an average house cat.
They can't snatch and grab a fully grown cat , to much weight to fly off.. And they would have way to much risk trying to kill a cat on the ground.