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.  doi.org/10.1007/s10071-020-01443-7 [PDF]