The bald eagle does not need the cow. The bald eagle visits the cow. The cow does not visit the rabbit. The cow visits the tiger. The rabbit needs the cow. The tiger chases the bald eagle. The tiger visits the bald eagle. If something visits the rabbit and it does not need the bald eagle then the rabbit visits the tiger. If something visits the bald eagle and it needs the bald eagle then it needs the cow. If something visits the cow and it does not visit the bald eagle then the bald eagle does not chase the tiger.
The bald eagle needs the cow.