Oh, this thread is turning my stomach. I feel so bad for the poor cat and the poor OP.
My cat is 100% indoor-only. Do I feel guilty about it? Yes, sometimes; she is obsessed with going outside and it’s very clear that she misses her pre-rescue life.
That being said, I live in an area with aggressive ferals, heavy car traffic, rat poison EVERYWHERE and the nausea-inducing practice of nabbing cats off the street as bait for dog fights. There is just no way to let her go outside and guarantee her safety so the choice is very, very easy for me.
I think in a perfect world all cats would be indoor-only, both for the cat’s safety and so that they cannot prey on wildlife.
That being said, I recognize the usefulness of barn cats (particularly if they’re adopted ferals) and I recognize that some people weigh the risks/benefits and decide it’s worth it to allow their cats outside.
Ultimately, this is a gamble that didn’t pay off for the owner or the cat. I would be very, very bothered if my dog did something like this, but I admittedly stay away from a lot of working breeds and dogs with high prey drive because I want a soft family pet and not something that would ever consider taking down a cat/rabbit/baby.
I think now that you’ve apologized all you can do is try to move on. It certainly wasn’t your fault.