In the Morrocan cities I visited, there were no rats due to a large feral cat population. Some of the cats had health problems, which was sad. I'd rather have

In the Morrocan cities I visited, there were no rats due to a large feral cat population. Some of the cats had health problems, which was sad. I'd rather have cats than rats, but cats aren't a solution on their own. I've read that birth control hormones work well for controlling rat populations. Dose their food supply consistently, and they die off without reproducing.