Cats are one of the animals that in my opinion "must be sterilized in a mandatory way" or at least those that are not permanently in our homes, I have a friend who did a little work on the impact of cats on the streets and discovered that they have a great negative impact on the local fauna, being the lizards the most affected! So much so that there is a study in Spain where they opened the stomach of a cat that had died and discovered 15 lizards, incredible right? te recomiendo ver este trabajo http://www.herpetologica.org/bahe/BAHE24(1)_Cons04.pdf