I assume that a feral/stray cat that isn’t too spooked by loud noises (which may or may not require them to be deaf, I’m not a veterinarian, nor an animal behaviorist) could have a decent time in a WW1 trench. Most soldiers were probably happy to pet them and/or bunk with them, and there would likely be a nearly endless supply of live rats to play with/eat somewhere.
I assume that a feral/stray cat that isn’t too spooked by loud noises (which may or may not require them to be deaf, I’m not a veterinarian, nor an animal behaviorist) could have a decent time in a WW1 trench. Most soldiers were probably happy to pet them and/or bunk with them, and there would likely be a nearly endless supply of live rats to play with/eat somewhere.