Broader adoption of keeping cats safe at home would have large benefits for cat welfare, human health, local wildlife and even the economy. So, should cat owners be required to keep their pets contained to their property?
The answer to the question is obviously “yes”.
Buildings: occupies so much land you can see vast gatherings of them from space. (Kills several hundred million birds a year.) Cats: look what they need to mimic a fraction of our power. (Kills over 4 times the birds mostly for fun.