I am cat sitting for my neighbor who has 3 cats. They told me everyday to throw any dry and wet food that is left and refill the bowls. There is always food left over. My question is can I take the "leftover" wet food to feed my 2 cats? Her cats are around 7 years and mine are 3 years if that matters. Is there any harm in feeding my cats with their day old food? I hate to waste their food.