Looks like it is only enabled when the interface is English. I do not see it by default here in Germany. But I get the paw when I add &hl=en to the url:

https://www.google.com/search?q=cat&hl=en

Oh, and it also works when I use the German word for "Cat" which is "Katze":

https://www.google.com/search?q=katze