In 2009, an estimated 62.1 million metric tons of eggs were produced worldwide from a total laying flock of approximately 6.4 billion hens. There are issues of regional variation in demand and expectation, as well as current debates concerning methods of mass production.
Olives are not toxic to cats, but have little nutritional value. Green olives and pimentos contain chemicals similar to those found in catnip, so some cats may be especially excited by olives.
Since the verdict isn't out, we're going to steer clear of any and all essential oil products in the future just in case. For more information about the danger of essential oils to cats, go to The Lavender Cat. The ASPCA web site also lists common house plants and household items that are toxic or dangerous to your cats and dogs.