The cat sees the dog. The cow needs the dog. The dog needs the rabbit. The rabbit is young. If something sees the dog then the dog eats the cow. If something is green then it sees the cow. If the cat eats the dog then the cat needs the rabbit. If something sees the cow then it eats the dog. If something needs the rabbit then the rabbit is green. If the cow needs the cat and the cow does not eat the rabbit then the cow eats the dog.
The dog does not need the cow.