Grade A â Eggs appear to be the same as Grade AA, but the difference is a slightly lower interior quality. These type of eggs are commonly sold in local supermarkets. Grade B â Eggs are noticeably different.
Rodenticides, colloquially rat poison, are typically non-specific pest control chemicals made and sold for the purpose of killing rodents. Some rodenticides are lethal after one exposure while others require more than one.
Arsenic compounds are sometimes used as rat poisons and insecticides but their use is strictly controlled. Surprisingly, arsenic can also have medicinal applications. In Victorian times, Dr Fowlerâs Solution (potassium arsenate dissolved in water) was a popular cure-all tonic that was even used by Charles Dickens.