I have had books say feed the usual just more and I have read just make extra of what you are eating. When we camped our little dog (did not have the lab mix) ate a mix of her usual dog food and human food (The human food usually came from what out son did not eat. Breakfast we might have done an extra egg and gave it to her.) If Bear and I go our for an over night he will get a mix of dog and human food just cause.