How do you get to the fox chicken and seeds on nabotti island in poptropica?

This is a classic puzzle. If you leave the fox with the chicken, the fox will eat the chicken. If you leave the chicken with the feed, the chicken will eat the feed. So the chicken must either be with the woman, or by itself. The trick is to cross twice with the chicken.

1. Take the chicken over.
2. Take the fox over, but bring the chicken back to the right.
3. Take the feed over.
4. Take the chicken back over.

Now you can open the cave (behind a bush on a rock), at the far right of the falls. The purple jewel is in the cave. There is also a Blue Egyptian Lily at the left above where your plane is.