It&#x27;s very common to let cats walk freely outside. It&#x27;s actually a bit of a problem:
<a href="http:&#x2F;&#x2F;www.nytimes.com&#x2F;2013&#x2F;01&#x2F;30&#x2F;science&#x2F;that-cuddly-kitty-of-yours-is-a-killer.html" rel="nofollow">http:&#x2F;&#x2F;www.nytimes.com&#x2F;2013&#x2F;01&#x2F;30&#x2F;science&#x2F;that-cuddly-kitty-...</a>