I have a pitbull that only eats all kinds of beef flavor dog food and he doestn like chicken at all and I would like to know why is that is that a problem or is that just the way he is do you think that's a problem? Because whenever I bring dog chicken flavor food he doesn't eat it at all and it scares me cause I don't know what to do should I feed him only beef and lamb and rice or should I try chicken cause to me chicken its more nutrient than beef