From MPC's blog:

Ulf Johansson and Wieden and Kennedy London have joined forces to create Cravendale’s new integrated campaign, Cats with Thumbs.  MPC worked with creatives Sam Heath, Chris Groom, Freddie Powell and Hollie Sayers to boost the kittens’ dexterity and take their acting skills to the next level!

The spot brings to life a man’s mental flight of fancy as he muses on what might happen if cats were to grow opposable thumbs.  The spot stars a number of polydactyl cats preparing themselves to try to get to the Cravendale milk they so love. The cats perform a range of human-like tasks with their evolved thumbs – they file their claws, knit, read [The Art of Military Strategy] and click their fingers, West Side Story-style.

The main challenge for this spot was not to use any CG and composite everything from live action plates.  Pre-production was essential as it allowed us to plan each shot as depicted in the storyboard and gave the cat trainer precious time to get the kittens’ acting skills up to scratch.  Artem built very detailed, matching paws for each of the cats featuring in the commercial which we used for some of the close-up shots. These were carefully tracked and composited into the cats' bodies. We then removed the real legs of the cats and used stills and numerous action plates of fur to marry the model paws together with the real cats.

The most challenging shot was probably the one where the cats are standing on their back legs and are walking into the house.  We built various versions of that shot, trying different approaches and using different plates in order to find the best takes to combine, as well as the best solutions for compositing, as it was very important to keep the real movement and shape of a cat standing and walking.  To achieve this we kept away from any warping or morphing and were clever in our use of the shot plates.

All the work was done in Flame and Flare with support from Nuke; head replacements, eyes, matching different takes of the cats and combining them into one seamless performance, were some of the tasks we had in order to tell the story of cats with thumbs, along with clean up and DMPs for set extensions.

Jean Clement Soret did the colour grading for the spot.

For more feline action follow feline overlord Bertrum the cat: or @BertrumThumbcat on Twitter