Anyone here uses these types of bowls? I've been meaning to get one but I'm not sure what would work best for my cats. My youngest kitty Loki eats his kibbles often too fast and vomits almost immediatly after. In the last couple of weeks he's also become quite gluttonous as well and will eat his portion for the entire day within an hour, leaving him and my senior cat Mittens without food for the rest fo the day until their next meal. My older kitty eats normally but I do not believe he would have much patience with an overly complex feeder. So what I was thinking was getting 2 types of feeder in which I could split the food into so it would last longer through the day and satisfy both my cats feeding habits. One that's a regular bowl with simple bumps/columns in the middle just to slow down Loki sufficiently and be simple enough for Mittens, and another more challenging puzzle feeder like say the Northmate feeder for the 2nd half of the food. Does that sound appropriate? What's you experiences with such feeders and your differnet cats? Do they ever lose interest? Did you ever had to return to normal bowls?