I'm torn about my cat-related response comment, so have a twofer:

1. "Animated by the same people who brought you 'Thundercats' for double purrrfection!"

or

2. What cats are really thinking: "I am employing an evolutionary adaptation brought upon by years of domestication, wherein I produce pleasing sounds similar to a baby's coo in order to trick you into feeding me."

He's clearly faking it.

This is the second best part of this movie.

That's what Winston's internal monologue sounds like

Is this a pirate cat or what?

"That be nice."