Jim Henson's Creature Shop provided "creature effects," namely Tom the cat and a troupe of trained pigeons kept by playwright Franz Liebkind. Though real pigeons were used for some shots, puppet pigeons were used for a sequence wherein the pigeons danced and performed the "Sieg heil!" movements. Victor Yerrid served as lead puppeteer for the animals. Individual pigeon puppeteers included Drew Massey, Joey Mazzarino, Fran Brill, Tyler Bunch, Tim Lagasse, Peter Linz, Matt Vogel, Martin P. Robinson, and Jim Kroupa, with Brooks himself voicing Hilda the pigeon.