The other day, I took Mr. Jenkins on a walk in my cat-backpack for the first time. Whenever I bring a cat on a walk, even in the backpack, I put him into a harness with a leash just in case something happens. This was the first time I brought this particular cat on a walk as he is one of my recent adoptions. What's amazing is that when I came back, I didn't take the harness off right away, but it seemed to completely sedate him. Mr. Jenkins has struggled with some fixation/aggression towards another one of my cats and I've been a bit at a loss at what to do. My question is about why the harness seems to have this effect on him and if it's okay to use it as a calming method. He's much less active while wearing it, so I don't want to risk losing his funny little personality, but I also want my other cat to feel safe. Mr. Jenkins has improved a lot in general with his behavior towards the other cats, but he's still not perfect. Anyway, thoughts would be appreciated.