Mollie the Giraffe (a female) was played by "Tweet the Giraffe" (a male) also known as the Toys R Us Giraffe. Tweet died on set at the Franklin Park Zoo. Luckliy for the movie, Tweet had completed all his scenes for the movie before his death.
This movie takes place at the Franklin Park Zoo which is in Massachusetts, in the state of Massachusetts there is a law prohibiting gorilla's of any kind from riding in the front seat of a vehicle. Bernie is seen driving as a passenger in the van violating this law.