The store sells chicken treats because people buy them.Tractor supply sells little bags of meal worms as treats for chickens
If you read the nutritional information on the labels, you will see that none of the "treats" has the right nutrients to be a complete chicken food. Most of them have warnings, saying to only let the chickens have a small amount each day.
Small amounts of any of those treats will be fine. Large amounts can cause problems. So just following the directions (small amount) should be fine. Skipping the treats would also be fine.
