When we had just two, they spent feedtimes moving from bowl to bowl, so in the end, as they only ate as much as they needed, I gave them one large bowl to share. With three, Joly was the greedy one and Izzy, slow, so we began separate feeding of Joly. Teddy is greedier than Joly, so now we are down to three, again, Monty is fed in the kitchen (He would be a pushover for the greedies), Joly in the living room and Teddy in his crate. This way everyone eats his own food, at his own pace and no agro.
Barbara, Monty, Joly and Teddy.