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.
Just because your dog can chew on your houseplant without getting sick does not mean it is safe for your cat. Cats have a more sensitive digestive system than dogs and are more vulnerable to certain plant toxins. In fact, Easter lilies (Lilium longiflorum) are not toxic to dogs but can kill cats. Because there are so many poisonous plants and herbs, it is best to pay attention to those that are the most toxic and those that are the most common. Familiarize yourself with the toxic properties of all plants you keep or grow near your pets.