Continuity mistake: When Stephanie steps into the petting zoo trailer her right sleeve is rip-free, but in the next shot as she walks in and takes a seat on the bale of hay, suddenly there are 2-3 large holes in her right sleeve.
Revealing mistake: While Gordon and James are in the mail truck trying to outrun the baddies, James opens the back door and starts throwing the boxes, and in the closeup we can see the knotted black safety strap attached to the boy's back for the stunt.
Continuity mistake: When Gordon goes looking for James, who ran off to find Spot, there's a sticker on the wall behind Gordon in the closeup which vanishes in the following shots, but reappears when they're in the mail truck together.
Continuity mistake: While Gino and Arliss are at the restaurant stressing about finding the dog, Gino tells Arliss that he hates Tommy because he has no respect, and when the cell phone rings two cans of dog food suddenly appear on the table in the next shot.
Revealing mistake: When Gordon falls with the broken drain pipe his yellow boxers are ripped off, but when he lands on the grass, even though we know he's supposed to be naked, we can see he's wearing white briefs in the side shot.
Visible crew/equipment: When Gordon's locked out of his building he climbs up the drain pipe, and while the pipe sways back and forth we can see the safety cable attached to Gordon.
Continuity mistake: When Spot witnesses the purse snatching he's suddenly wearing a collar, which promptly vanishes again.
Continuity mistake: When Agent Sharp switches the ID tags on the animal crates, the ID tag on Agent 11's bars changes position between shots.