From what I've seen, they are "predator resistant". Nothing is 100% predator proof.
It seems that they use a door that slides down into a groove at the bottom of the sill that keeps the predators from getting their claws underneath the door.
I'm sure it works pretty well. But a motion sensor light or some sharp objects glued to the outside of the door might help discourage whatever would try to get in.
Good luck!
Matt
It seems that they use a door that slides down into a groove at the bottom of the sill that keeps the predators from getting their claws underneath the door.
I'm sure it works pretty well. But a motion sensor light or some sharp objects glued to the outside of the door might help discourage whatever would try to get in.
Good luck!
Matt