Revealing mistake: You can easily tell that the snow in the end is fake.
Fluke (1995)
Plot summary
Directed by: Carlo Carlei
Starring: Samuel L. Jackson, Matthew Modine, Eric Stoltz, Nancy Travis
Waking up on his very first mornig, Fluke - a newborn puppy - discovers a wondrous world of excitement and fun. Whether romping and wrestling with his brothers and sisters or curling up by his mother for a nap, Fluke is as contented as any young pooch can be. But when recurring dreams and a series of mishaps trigger memories of a very different world, he slowly realizes that he once had a very different life - as a man! Convinced of his previous identity, Fluke sets out on an extraordinary journey that lands him back with his human family...and shows him more through the eyes of a dog than he could ever see as a man.
More mistakes in Fluke
Rumbo: Hey. Hey! What's going on?
Young Fluke: I guess I was dreaming.
Rumbo: You were what?
Young Fluke: Uh, dreaming. I was seeing pictures inside my head.
Rumbo: Pictures ain't got no business being inside your head. Next time you just growl and chase 'em away.
Young Fluke: Rumbo, have you always been a dog?
Rumbo: What you talkin' about? What else could I have been?
Young Fluke: I don't know. A human.
Rumbo: A two-legger? Me?
Trivia: The two main dogs are played by Comet (from Full House) and Barney (from Homeward Bound).