Dog cognitive development: a longitudinal study across the first 2 years of life.

Bray, E. E., Gruen, M. E., Gnanadesikan, G. E., Horschler, D. J., Levy, K. M., Kennedy, B. S., Hare, B. A., MacLean, E. L. (2020). Dog cognitive development: a longitudinal study across the first 2 years of life. Animal Cognition, (0123456789).  DOI 10.1007/s10071-020-01443-7 [PDF]