During the credits the two rats' argument about "the chicken or the egg" continues. There's also a short clip of Rocky telling them to shut up.

Chickens don't have teeth, even though every chicken in this film is shown to have a full set. This is because of the traditional Aardman animation to have every single character to have a cheesy grin.

During the film Mrs Tweedy removes a chicken named "Edwina" for not laying enough eggs. This is a reference to the Conservative former Health Minister, Edwina Currie, whose political career foundered over an egg-related farming crisis in the UK.

According to the pattern of the scarf she is wearing, the Scottish chicken Mac belongs to clan MacLeod of Lewis.

There was a major push to get the film nominated for Best Picture at the Academy Awards. The failure to get the nomination, and the popularity of the film among Academy members led to the inclusion of Best Animated Feature for the next Academy Awards (2002), which was won by fellow Dreamworks film Shrek.

The original script featured an additional character: Ginger's little brother Nobby. Dreamworks suggested that Nobby was left out, in order to make the film "less cute".