Been a few stories and sightings here in Southeastern Nebraska going around, too.
Within last few years, had one hit by a car just across the river over in Iowa (Hamburg), and then one was darted/captured just off the 680 interchange near heart of Omaha.
Local police in Paul, NE (just north of Grand Island) shot a big male near the grade school.
I had heard the stories for years while I was growing up, and I've always wanted to find a track or see one while running sets...but never have myself. I used to brush them off as just stories, too. And, depending upon the source, perhaps many of them were just that.
But, with the confirmed kills, incidents, and captures in recent years in this part of the state...where recorded confirmed evidence hadn't existed for nearly a century, well...anything is possible now.
Seeing other "odd" and "out-of-place" wildlife showing up, too. Armadillos are certainly not native to our state, but the last few dry, warm spells put them in peoples lawns in the South-Central part of the state.
Good luck with your cats!
Jim-NE