Do you wonder how the scenes involving owls were created and shot for the Harry Potter movies? This article has some interesting "behind the scenes" information. Animals received royal treatment during filming. In many cases, the animals received better treatment than the human actors – such as the scenes with the cats Mrs. Norris and Professor McGonagall. Many of the scenes take place in a real castle, which was actually quite drafty and cold. For the cats' comfort, they were provided heated floors to keep their paws and their bodies warm. The human actors had no such comforts.