Continuity mistake: When Dr. Dolittle goes to see the bear in jail, he walks down a hall with animals behind bars. In one of the cages is a big python. They don't keep snakes in cages with bars because they could easily escape.
Continuity mistake: When Dr. Dolittle goes to tell his daughter Charisse that they are not going to Europe, Charisse is seen on the bed resting on her knees but when the camera angle changes to a view behind her she is now seen sitting on the bed.
In the scene where Archie is introduced to the forest animals, a man presses the button to turn on the song. This man is Doug Seus, the famous bear trainer whose bears have been in at least 8 other movies.