Hmmmm This is JUST me yapping... not arguing.
Some of my cats showed an interest in grass, but only when they were kibble fed. It is pretty much a given, kibble creates turmoil in their tummy's.
My current 6 have no interest in grass. They don't get to roam the backyard, but the grass does grow right up to their outside enclosure. It pokes through the metal squares, before I trim.
Some of them putz with the grass, but they don't eat it. I should say... I only see them play with it, not eat it. I don't see grass in any "deposits" either.
Leonard was allowed to roam the backyard, because he wasn't a runner. He didn't eat grass.
The only cat I had that did eat grass, did have tummy issues. I assumed cats eat grass so that they CAN throw up, whatever is bothering him/her... like dogs do.
I'm going to have to check into this subject... I don't think I came to my conclusion, out of thin air, but... ya never know!
OTish What kind of harness do you use? I had one once, but I tossed it when one of them was able to finagle her way out of it. I'd like to get another one, but a good one.