Thanks Winston for the suggestion.
I thought of all sorts of things including phone books but everything I thought of he'd knock the bowl onto the floor while he's eating. He pushes his bowl around unless it's on carpet usually. I thought the plant pot was a great idea if I could only get at them..
The one I'm thinking about has square sides which means the bowl would stay put in it but can't get near it.
The great thing about me holding it is he's slowed right down while he's eating which means he doesn't choke on his food like he used to. It took a few days before he slowed down but now he's really good about it