You are right about them sticking to a certain route - we have paths made through our fields by the badgers, and smaller paths made by the foxes too. Our neighbour was telling me, when he moved in to his house, he got out of the car one night, no outside light on, and said he felt something walk over his feet, looked down and it was a badger!!! I told him he must have been walking on its route, so it walked over him. He said he just froze, and it carried on its way quite unperturbed.
I have 20 plus farm cats here, kittens always around too. Never lost any of those to badgers, although I lost two elderly cats in separate incidents, and they were both at night, so maybe a badger took them. I know the cats are not bothered by foxes - cats sit waiting for the car at night, and in the headlights I have seen a fox sitting with them!!