Oh and we have a cat... but he completely failed us! I was really disappointed in him.
But this rat was in the walls and ceiling so our cat had no chance to get him. In defense of our cat... we used to have moles digging up the yard constantly. We have not seen a mole mound for years since we got him.
Mice are dumb and easy to catch. Rats are way more clever and challenging and they have to chew to keep their fangs filed down so once they make themselves comfortable it gets ugly fast. We ended up sealing this rat out. I was hoping we would seal it in and then it would get desperate and go for the traps and then we would have closure. But this all started suddenly and ended just as fast when they finished sealing up the entry point. It all went quiet. No more leaks popping up every single day.