Hello, my 12-year-old spayed cat howls when I'm in the shower. I think it's separation anxiety, but as far as I know, he doesn't do that when I leave the apartment. I've tried bringing him into the bathroom with me, but the sound of the shower scares him. When I hear him, I yell for him and he settles down a little bit, but I don't know if my neighbors can hear him or be yelling for him. It stresses me out. I'm sure I should just ask the neighbors, but I rarely run into them and if they haven't noticed the noise, then I don't want them to start listening for it.
Any ideas? Thanks