Continuity mistake: When Tramp watches the dog pound carriage the broken part of the fence changes its shape between shots.
Continuity mistake: At Trusty's front porch, after Lady drinks from the bowl, when we see the three dogs together the crack on its edge disappears.
Continuity mistake: At Trusty's porch, Lady lowers her head and drinks from a bowl. Just a mere frame later there's a close-up of the bowl and she is away from the bowl in a totally different position.
Continuity mistake: When we meet Trusty his snout lays on the wooden floor. In the immediate next angle it lays on the rug.
Continuity mistake: When Jock and Lady walk to Trusty's place, in the wide angle he is nowhere to be seen, only to suddenly appear at the front porch in the close-up angle.
Continuity mistake: When Jock buries his bone a falling leaf lays by the tree behind. In further shots it disappears.
Other mistake: During Lady's first night home, there's a shot of the family's clock: the number seven is painted as a six.
Continuity mistake: After Jim puts a chair blocking the door to stop Lady from exiting the kitchen, she starts to cry. Check the pattern of the floor tiles: her position changes between shots.
Continuity mistake: Puppy Lady runs to the stairs, leaving the blue blanket inside the basket. When Jim puts her back in the position of the blanket is different.
Continuity mistake: Jim puts Lady in her the basket and covers her with a blanket. A shot later Lady is not covered.
Continuity mistake: When puppy Lady stands on the rug demanding to go upstairs, she stands on the right side of the rug. When the shot changes she's standing on the center part.
Continuity mistake: When Jim shows puppy Lady her basket, a pillow suddenly appears between shots.
Continuity mistake: When Tramp is looking at the puppies in the pet shop window, you can see there is a bowl at the back, but when the camera angle changes in the next shot, the bowl is now at the front.
Continuity mistake: After Tramp fights off some stray dogs in a back alley, we see him standing adjacent to a wooden fence. The next angle shows him near some barrels, trash and wagon wheels instead of a fence.
Continuity mistake: When Darling is busy knitting something for the baby, her ball of pink yarn falls to the floor. The length of string she was using is taut at first, but once the shot changes a significant amount of slack appears on her lap. (00:21:30)
Continuity mistake: After Jock and Trusty stop the pound carriage in its tracks, an oncoming taxi illuminates the back where Tramp is locked up. Here we can see the door's cage has no broken metal wires, but two shots later where Lady walks up to it, a couple of its wires are suddenly sheared apart. (01:12:00)
Continuity mistake: When Lady and Tramp's puppies are waiting for Trusty to say something about Old Reliable, the gifts beneath the Christmas tree rearrange themselves. Watch how different they look in the closing shot from inside the house before the movie ends. (01:15:00)
Continuity mistake: When Jim Dear is taking the family photo, the distance between the table and the cushion on the left and where Lady and the puppies stand suddenly decreases between instant cuts. Note the decorations on the rug.
Continuity mistake: When the puppies are playing with Jock, the drumsticks and toy soldier disappear and reappear randomly between shots.
Continuity mistake: The size and position of the hole in the newspaper changes between shots. Note its distance to the upper part of the paper.
