Tom in this episode wears a red hunter's cap. When he is hit with the anvil the first time and turns into a table, the hat is not present. When he returns to normal a couple of seconds later, however, he is wearing the red cap again.
The rock Quacker tumbles over when he lands (after Tom wings him) disappears.
After Tom corners Quacker and Jerry saves him, Jerry carries Quacker into his home. When they enter Jerry's home, there is no door handle on his door on the outside. When Quacker opens the door to join up with a flock of ducks, there is now a handle on the outside of the door.
Baby ducks do not support the full adult plumage of a grown mallard duck; they are usually the same colour as their mothers.