Just two rats, once sexually mature, could amount to about 15,000 rats in a year. Can a contraceptive succeed where traps and poisons have failed?
As California and other states restrict the use of highly toxic rat poison, cities across the country have turned to a new method to try to control their rat populations: birth control.
Rather than a pill, the contraceptive, otherwise known as ContraPest, is deployed in bait boxes as a fat- and water-rich liquid and targets their reproductive abilities, preventing them from contributing to the already existing population. .