Movie S2.

Latency to vocalize during novel object of a dog that was released from the program and a dog that was placed as a guide.

Effects of maternal investment, temperament, and cognition on guide dog success

Emily E. Bray, Mary D. Sammel, Dorothy L. Cheney, James A. Serpell, and Robert M. Seyfarth

PNAS. 2017. 114:9128-9133 DOI: 10.1073/pnas.1704303114