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.
Tea tree oil may also be toxic to pets if ingested. Veterinary toxicologists found that large amounts of undiluted tea tree oil applied to the skin of cats and dogs caused a hypersensitivity (allergic) reaction. If you are allergic to eucalyptol, use TTO with caution, as many formulas are mixed with eucalyptol.