The kernels are in the bad place.
For Utopia 4-8, send a Red bird above the … well, big red bumper with its own gravitational field? Anyways, fire the Red bird north of that so it bounces off the right wall and ricochets into the pile of kernels below. Then sit back and watch the chaos unfold! If you are super unlucky and a pig survives, the Blue bird should help. Alternatively, you can aim the Red bird directly into the bottom part of the big red bumper to have the bird bounce directly into the pile of kernels.