Dogs bark when they talk. If a word not in the Toontown dictionary is used through the SpeedChat Plus option (assuming the player does not have the true friend option on), or other toons who do not have SpeedChat Plus, the word will be "censored" by "woof," "arf," or "rruff." If an exclamatory phrase is used, the dog will bark loudly. If they say "Owoooo!", it would sound like the dog is howling.
Dogs have four different head designs that can be used to create a toon through the Create-A-Toon process. They also can be created in any color of the player's choosing.