Rhinos are poached for illegal trade in their horns, valued for their medicinal properties. According to an article in the BBC, a combination of GPS trackers, heart rate monitors, and hidden cameras, placed inside the horn of a rhino, could alert officials within seconds and offer protection to the few specimens left. The news, welcomed by many environmentalists, also highlights the number of species that are in danger of extinction. At the same time, the Department for Environment, Food & Rural Affairs in the United Kingdom does not predict a shortage in the supply of chickens. Chickens, unlike rhinos, are not threatened with extinction. Briefly explain why.