The Secret Life of Pets (2016)

Other mistake: Duke is running through the city while dragging Max by his leash. A close-up shows Max being pulled between the bars of a metal fence, but the gap is much too small for Duke to have passed through.

Snowball: Welcome my dogs! Oh, you guys look weird. Hurry up, come on in.
Buddy: You said it was a costume party.
Mel: Why do you listen to me?

Trivia: When Snowball and Max hijack the bus and take it on the Bridge there is a short shot of the back of the bus which has a poster on it that says "SING", a reference to the next Illumination film.