1881, Thomas Lewis Owen Davies, James Orchard Halliwell-Phillipps, A Supplementary English Glossary[1], G. Bell and Sons, page 132:
COCKADOODLE, to crow like a cock (onomatopœous). The peacocks, with their spotted coates and affrighting voyces, for heralds,the prickt and enlisted; and the cockadoodling cocks for their trumpeters.—Nashe, Lenten Stuff (Harl. Misc., vi. 170).
1910, The Lone Hand[2], volume 6, W. McLeod, page 315:
No dog voice uttered that awful yell. The figure about the height of a dog was that of Mr. Tittibochel, searching the nests for a new-laid egg to mix with his nightcap of brandy, a cockadoodle broth of which he was extremely fond.
2017 September 7, Carmel Harrington, Cold Feet: The Lost Years[3], Hodder & Stoughton, →ISBN:
A little cockadoodle puppy galloped towards her, its lead trailing behind him on the leafy path.
2019 December 3, Sophie Ranald, Out with the Ex, In with the New: An utterly perfect feel good romantic comedy[4], Bookouture, →ISBN:
The neighbor's dog - Hannah had told me once that it was a cockadoodle and they'd paid a fortune for it from a breeder - broke into hysterical barking.
2023 June 6, Daniel M. Russell, “What's the Most Likely Way You'll Die?”, in The Joy of Search: A Google Insider's Guide to Going Beyond the Basics[5], MIT Press, →ISBN, page 79:
What is the definition of a “breed”? (Is a cockadoodle a breed of dog? Is the Savannah cat really a domesticated cat?")
2023 August 14, Joe Saunders, “The Pronunciation Cassette Tapes” (0:48 from the start), in Solar Opposites[6], season 4, episode 4, spoken by Kevin (Ken Marino):
“This creature has facilitated your coitus?” “He's a cockadoodle. Half cocker spaniel, half poodle, specifically bred to save marriages.”
