National Lampoon's Christmas Vacation

National Lampoon's Christmas Vacation (1989)

Ricky the Rottweiler shows up throughout the movie. 

Just Married

Just Married (2003)

WARNING: A DOG DIES

The Lobster

The Lobster (2015)

WARNING: A DOG DIES.

The Amityville Horror

The Amityville Horror (2005)

Brown border collie on and off throughout the movie.

Southland Tales

Southland Tales (2006)

White chihuahua about halfway through.

Haibane Renmei

Haibane Renmei (Series) (2002)

Doberman at 15min in episode 2.

Case 39

Case 39 (2009)

German Shepherd at 1hr 28min.

Hercules

Hercules (1997)

Bulldog at 39min.

Room

Room (2015)

Dog on screen for a couple minutes towards the end of the movie.

Scooby Doo

Scooby Doo (2002)

The only dogs are the animated Scooby Doo and Scrappy Doo characters.

Maleficent

Maleficent (2014)

Dog at 22min.

Dead Alive

Dead Alive (1992)

Shepherd type dog around 12min, but gets eaten at 30min by the grandma.

A Million Ways to Die in the West

A Million Ways to Die in the West (2014)

Plugger is a boarder collie type dog who is in and off screen throughout the whole movie.

The Princess Bride 2

The Princess Diaries 2 (2004)

Standard size white poodle who lives in the caste is on screen for a few shots throughout the movie.

Take Shelter

Take Shelter (2011)

First shot of the family dog at 10min. He's in a couple scenes later.

Infinity Chamber

Infinity Chamber (2016)

Dog at 1hr 36min.

The Meg

The Meg (2018)

Smol doggo names Pippin at what I imagine is 3/4 of the way through the movie. Dog appears again at the very end.

I only saw the end, so I may have missed dogs earlier in the movie. I will update after I watch again.

The Parent Trap

The Parent Trap (1998)

A dog is on screen for a brief moment after the girls get to camp. Then we get to see the dad's golden retreiver a couples times throughout the last half. 

The Other Side of the Door

The Other Side of the Door (2016)

We get to see the family dog Winston quite a bit throughout the movie. Beware though, he gets stabbed at 1hr 24min.

Skyline

Skyline (2010)

Scruffy little pup at 22min, again at 32min.