In a rush this morning, I stuck the DC in front of the TV with their toast and scrambled eggs whilst I got ready myself. The dogs are great when they are eating, but not wanting to take any risks, I shut them in the dining room. We have french type doors between the lounge and dining room which can lock.
Last thing before leaving I let the dogs out to the loo and shut the french doors but didn't lock them. The dogs can push them to open them, but don't usually as they know they need 'permission' to come into the living room. The DC's plates were almost empty but left on the living room floor in my rush.
When I got back, the french doors were open, the plates had been cleared, but the dogs were back in the dining room, not looking in the slightest bit guilty but wagging their tails enthusiastically at me. 
Clever girls, how could I be cross?! (They were clearin up the mess really anyway!) 