My lead hen - in a flock with no rooster - lays eggs now and then (it took 11 months until her first egg) and has a special friend in one of my other hens.
She ‘mates’ her special friend sufficiently frequently that the poor girl has lost some feathers. I call them the Odd Couple - they are...
Why not move the rooster into a more controlled environment like the garage or mud room if you have those or the living or guest room if you don’t.
Away from any hens and rodents.
I suspect that would settle it pretty quickly.