The illustration of the nursery contains as an Easter egg a painting of the author himself, Terry Pratchett. This quite possibly represents Young Sam's imagination. The objects in Young Sam's nursery also become animated. The Discworld characters are drawn in the same style as Vimes and Young Sam, but the pastel animals are still present, and all three settings (the world of Where's My Cow?, the streets of Ankh-Morpork, and Young Sam's nursery) begin blurring together. The third style occurs when Vimes starts changing the story. The pictures of Vimes and Young Sam are in front of these pictures, and do not interact with them. The second style is that of the book within the book, which is simple, with thick lines and pastel colours. This is used for Vimes relating the story to Young Sam. The first art style is a fairly realistic style, with a slight cartoony feel. There are three art styles in the book, all drawn by Melvyn Grant. In the framing story of Where's My Cow?, Young Sam also says 'Buglit!' when Sybil comes upstairs to see what all the excitement is. Sam then stuck rigidly to the authorized version. In Thud! we learn that the next day Young Sam said 'Buglit!' (an attempt at Ron's distinctive 'Buggrit!') and Sybil pointedly never raised the subject.

He therefore attempts to rework the story into what he calls the 'Vimes street version', about a search for 'daddy' through the city, encountering such characters as Cut-Me-Own-Throat Dibbler, Foul Ole Ron, and the Patrician.

Sam eventually decides that this is a daft way to look for a cow, and that Young Sam should, in any case, be getting taught about Ankh-Morpork rather than animals he will only see on a plate. The book describes the search for a cow, in which various animals that are not cows are identified by the noise they make. The book is written as a children's picture book and tells the story of Sam Vimes reading the picture book Where's My Cow? to Young Sam. This looks slightly similar to the Carnegie Medal sticker on the paperback of The Amazing Maurice and his Educated Rodents. The cover bears a gold sticker reading ' OOK! The Ankh-Morpork Librarians' Award - Children's Winner'. Where's My Cow? was released on 23 September 2005, to coincide with Thud!. It is based on a book that features in Pratchett's Discworld novel Thud!, in which Samuel Vimes reads it to his son. Where's My Cow? is a picture book written by Terry Pratchett and illustrated by Melvyn Grant.

Where's My Cow? by Terry Pratchett