Macekre: You did watch the original Japanese movie that this was cut from. Right?
Narm: For people used to the Japanese version, or even certain non-English dubs that kept the dark narrative of the former, the Lighter and Softer-turned English version can come off as this.
Squick: When we see close-ups of the mates of both Milo and Otis giving live births.
It doesn't help if you know that pugs, having been specifically bred for cuteness and nothing else, are almost always physically incapable of giving birth without surgical assistance.
Tastes Like Diabetes: Played with. There are a couple of particularly sad and scary moments in the movie.
Tear Jerker: The animal abuse and numerous amounts of kittens that were killed during the filming of this movie.
To be clear, the allegations of animal abuse and kitten deaths have never been conclusively proven, and in fact there is ample evidence to suggest that these claims are unfounded. However, it's difficult for many people to watch this movie, especially the original Japanese version, and not believe that there's something to the allegations. Some scenes are incredibly hard for animal lovers to watch. For example, it's tough to watch the cliff scene where a cat is clearly thrown from a decent height into the sea, and then (in the Japanese cut) watch the cat desperately try to claw her way up the cliff side, only to fall back into the water. And limp around with a broken paw (actually injected with mild anesthesia). And have a pug getting into an altercation with a bear cub.