>>149876786
>According to Genndy Tartakovsky, the film was first conceived in 2009, as an animal road-trip film under the title Buds, with Tartakovsky wanting to capture the dynamic of his friend group. The film originally consisted of different types of animals, but after an executive suggested that it needed a stronger hook, Tartakovsky asked "What if one of them is a dog and he realizes he's going to get neutered in the morning?".
He's been trying to make the film made for like 16 years.

2009, the year he claims to have come up with the idea of this movie, also happens to be the year when the Hangover was released.

Which may not be a coincidence since the plot synopsis and trailers make it seem like the movie is basically just "The Hangover but with dogs and instead of getting married one of them is getting neutered the next day".