This interview is actually the most we've heard Ubisoft open up about this type of game. Galarneau discusses the differences in regional markets, in-game advertising, and failure states in casual games. But the really interesting part comes at the end, when the subject of the Z came up. Ubisoft inherited the "Petz" naming convention from the original PF Magic-developed series, and kept it. Now the company sees it as kind of an identifying trademark. "But one thing we have to make sure of is that people understand that the one with the "z" is the one we're pushing. It's not just "Pets" or "Dogs", as any dog or any pet. It's Petz. My team would say "Dog Z" most of the time."
When told by Gamasutra's Brandon Sheffield that "Dog Z" sounds like a specific dog, Galarneau said "There will be Dog Z in the game, in fact."