Not at all. If they are eating the pellets, let them eat them! But there is no point in wasting food. First check the feed they are rejecting (I thought it was the pellets?). Check the mill date, make sure it is fresh. Then give it the sniff test. Check to be sure it's not damp or moldy or buggy. If it's good, I would go ahead and mix it with the feed thay are eating, until it's all gone. Because really, who can afford to throw away a bag of feed? Mine is something like $18 a bag. If it's bad ... well then pitch it. It's not worth getting your babies sick on bad or moldy food. Use your best judgment.
But as for the scratch and treats and extras .... think of those as cake and cookies and ice cream. Occasional treats in small quantities, not part of a regular diet. If they fill up on that stuff then they won't eat their "meat and potatoes" - the good nutrition in the balanced diet they NEED to be healthy, right? So, easy on the goodies, Dad!