Granted, it was a cougar, but still...
The pictures are fake. You can see the rigor on the cat. Its legs are in the same relative position in every photo.
We have the bones of guard animals who have been killed on this property by lions and coyotes.
Sure, it can help but don’t count on it. The guard animal is a rather recent phenomenon and if it really worked, those who settled this country would have used them.
Tips:
The guard animal should be raised with what it is to protect.
You should have only one animal per herd/flock (If you have more than one then the loyalty is to each other, not the flock.)
There is no way a guard animal is going to work against a large number of predators.
Guard animals are a liability if a human trespasses. The old property laws are gone and you are liable if someone is hurt.