Continuity mistake: When the kid rescues Bud from his former owner, Bud's paws become all muddy when the faucet breaks. In the next scene they are running down the road and Bud's paws are clean.
Continuity mistake: During the basketball game at the end of the movie watch the time on the scoreboard. One view of the score board shows 30 secs and the next view of the kid dribbling down court with the scoreboard in the background shows like 10 mins left.
Continuity mistake: In the scene where Coach Barker is throwing balls at Tom, the ball racks in the wideshot are empty. However, in the close-up shot of Coach Barker, one ball rack is full of balls. (00:52:50)
Continuity mistake: When Buddy's owner is chasing Josh and Buddy in his truck, there is a scene that shows the truck approaching the water which is a couple of hundred feet away. As the camera cuts back to the driver, he does way too many things before the truck goes in the water (slams on brakes, steering wheels falls off). When about 10 seconds has lapsed, the exact same camera angle is shown of the truck being a couple of hundred feet from the water. The truck would have already been in the water by then.
Continuity mistake: When Buddy pushes the ball to the top of the stairs, the blue side is facing up. But in the next shot the red side is facing up.
Continuity mistake: At the beginning of the movie, we saw the box with the dog falling down to the road. It falls at the left side of the road. When the truck passes, the box is on the right side of the road.
Continuity mistake: In the scene where Josh is making a doghouse for Buddy out of a cardboard box, he puts a smiley face on it. In the close-up, he draws two long lines for eyes, and a thin smooth curve for a smile. A second later, the eyes are dots and the smile is drawn in a heavy, messy line that's thicker on the left side than the right.
Continuity mistake: Throughout the whole movie the weather changes. They would show it being sunny when the kid is running to the fence then when they switch camera angles and he's on the other side of the fence it is cloudy.
Continuity mistake: At the beginning of the film, we saw the box with the dog falling down in the street. The road is dry. When the truck comes the road is wet.
Continuity mistake: During the basketball game near the end of the movie, the score is shown as being 51 to 65 after a time-out ends. About 10 seconds later, a close-up of the scoreboard shows the score to be 45 to 55.