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.
Essential oils to especially avoid around cats. Although it is recommended that all essential oils be avoided with cats, there are some that are especially problematic due to high levels of 1,8-cineole, camphor, limonene, methyl salicylate, pinene, as well as essential oils with significant ketones and phenols.