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.
Peppermint Oil and Phenols. The American Society for the Prevention of Cruelty to Animals states that cats are particularly sensitive to peppermint oil, noting the oil may cause harmful effects to the gastrointestinal system, central nervous system and liver. As well, inhaling the oil may cause aspiration pneumonia. However, the peppermint plant is not listed on the organization's toxic and nontoxic plant database as being safe -- or unsafe -- to pets. PetMD considers peppermint to be a cat-friendly plant, advocating it for home gardens.