I don't have any experience with automated feeders, but many on the forum do and swear by them. You could invest in 2 timed auto-feeders to dispense your chosen amount at, let's say - 2pm? Even if it's a small snack just to tide them over until you get home, it can help you manage their feeding schedule so they are not ravenous when you get home - especially since I'm assuming they are currently free-fed.
You could also try a wet meal in the morning which will keep them fuller for longer if you don't want to buy the timed feeders. Others with more experience will chime in soon, I'm sure. Good luck!!! 