people are very good at seeing their pets conforming to their expectations, whether that is scientifically true or not :)

https://www.sciencenews.org/article/dog-breed-individual-beh...

> Breed offers little predictive value for individuals, explaining just 9% of variation in behavior.

https://www.science.org/doi/10.1126/science.abk0639

https://www.scientificamerican.com/article/which-dog-breed-s... (here note how big the overlap is between breeds for most traits, and clumpiness is rare, but present)