Trixie is a character in Toy Story 3 and Toy Story Toons. She also served as the protagonist in Toy Story That Time Forgot. She is a blue plastic Triceratops, one of the toys owned by Bonnie and is part of the same toy line as Rex.
Don't think a story like this exists. Add dinosaur / prehistoric characters to the relevent species. No modern animals, there are other stories for general species.
