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dog bite out of the blue: Serpell J, Duffy DL, Jagoe JA. The Domestic Dog: Its Evolution, Behavior And Interactions With People. 4th ed., Cambridge University Press, 2015.145.

Patricia McConnell: Patricia McConnell. (2009). Dogs and Kids. The Other End of the Leash blog. https://www.patriciamcconnell.com/theotherendoftheleash/dogs-and-kids

quiet voices: Bray EE, MacLean EL, Hare BA. (2015). Increasing arousal enhances inhibitory control in calm but not excitable dogs. Anim Cogn. doi: 10.1007/s10071-015-0901-1.
See also: Asheville Humane Society. Chill Out! Dealing with the Overly Aroused Dog. Asheville Humane Society website. Accessed January 2024. https://www.ashevillehumane.org/overly-aroused-dogs/

For the rest of his life: Sinn L. (2019). Puppy & Kitten Socialization. Clinician’s Brief. https://www.cliniciansbrief.com/article/puppy-kitten-socialization

drive: Lazarowski et al. (2018). Investigation of the Behavioral Characteristics of Dogs Purpose-Bred and Prepared to Perform Vapor Wake Detection of Person-Borne Explosives. Front. Vet. Sci. https://www.frontiersin.org/articles/10.3389/fvets.2018.00050/full#B1