My dogs would literally jump through hoops to get to the cat food and they have suceeded a couple of times. I dont know what kind and how many dogs you have so I dont know whether you should fast them or not. For dogs like mine if one or two ate the whole two lbs, yes I would fast for today. If all five of my dogs shared, yeah right, then I would give them dinner.

Cat food isn't good for dogs as a daily regime but I dont think eating it on ocassion is reason for alarm.