Hank, on working with the same Azriel cats in "The Smurfs 2" as in "The Smurfs":
"It's funny because you do know them. There's four of them, and you know which ones are good at what. There's a specific thing with cat acting because they're not like dogs. They can only really do a limited amount of things: They can basically only hit their mark or turn their head and walk out or walk in when you want them to. Dogs can do a lot more. So then you know the drill. And always when cats are in the shot ... there's clicking and buzzing going on over your dialogue to get the cat where it needs to go. So you don't fret that."