You mean that bird that has tried to bite your finger in half?
Most birds that do not have an injury to the beak can eat even the hardest, densest nugget.
If your bird prefers, try moistening the nuggets. Nuggets may be pre-ground as well.
If your bird does have a beak injury or situation that does not allow chunked grain nuggets try feeding Harrison’s Bird Bread for the same great results in a much softer form.