I have a quick question,My cats have been eating the same brand and same flavor of food for about 5 years,now all of a sudden,they won't eat it.And the act starved any time the :censor::censor::censor::censor:.is opened or when we eat something.Does everyone feed their cat's different food or the same one all the time?{they do eat small amounts of it)And if I change how do I go about it? Thanks Sherral