My two eat together on the patio but on opposite sides of the sliding door. I put Kobie's dish down first (she's the alpha of the two, and also the quickest to sit for her meal), then Eli's, and practically before I've turned around and closed the door Eli's done. He learned as a puppy not to hover around Kobie while she eats--he got some serious growling directed his way!--so he knows to just leave her alone till she's done. Kobie "trained" him not to be obnoxious!

They always lick each other's dish when they're both done eating, too. No problems at all!