During the surprise birthday party scene you can see former Miami Herald columnist Dave Barry standing on the right of the shot smiling.
Beach scenes apparently set in Briny Breezes, an area nicknamed "Dog Beach" by locals for its friendliness to the canine set. Palm Beach County Commissioners banned dogs from the beach, for reasons self-evident in the last beach scene.
The "Sun-Sentinel" and "Philadelphia Inquirer" office scenes were filmed on location.
Cameo: [John Grogan] The original book's author appears as the Cocker Spaniel owner in the dog training class.
Jennifer Aniston hadn't read the novel before she was given the script and originally turned it down since she didn't find a dog movie interesting.