The birds often drop the tiny round seeds, is this because they don't like them?

The small round seeds you refer to in the Ark Hearty™ Mealworm Mix are the red and white dari, which are high carbohydrate tonic seeds. All our mixes are specially formulated for wild birds’ nutritional requirements and the birds will take the tonic seeds as and when they need them throughout the year. Obviously this will mean that with changes in season and migration patterns the amount of tonic seeds they require will vary.

I've opened my bag and I can't see any mealworms, have you sent me the right stuff?

We use ribbon mixing technology that means the entire batch is mixed continuously to ensure consistent mixes from the first to the last bag. This does however have one drawback and that is that the mealworms degrade (get smashed) during the mixing process and the early bags tend to have more ‘wholes’ than the tail of the mix. The crushed mealworms adhere to the seeds and the birds get the full benefit of the additional protein in their diet despite the variable look of the product.