Welcome to the OSF page of ManyDogs 1 (MD1). Here you will find the pre-registered design and analysis plan, data, analysis scripts, supplementary materials, and the link to pre-print of our manuscript which has been accepted for publication in *Animal Behavior and Cognition*. This project is now finished, but if you are interested in participating in other ManyDogs studies or getting more information about the larger ManyDogs project, please head over to our website (https://manydogsproject.github.io/). If you are interested in using the MD1 data for spin-off projects and secondary analysis projects that use the study design and/or entire data for publication in a peer-reviewed journal, please follow the licensing guidance. We do not require, but strongly encourage that the consortium's theoretical and data contribution be acknowledged in secondary projects with an appropriate place in the author list. Regardless of authorship, the data and study design should be acknowledged in these publications with the following statement: “This project uses data collected in ManyDogs 1, a multisite study by the ManyDogs Project. The original study design and pre-registration are available at https://osf.io/9r5xf. ” Data and analysis scripts for MD1 are available on this OSF page as well as on the ManyDogs GitHub: https://github.com/ManyDogsProject/manydogs1_abc ManyDogs logos for use in acknowledgements can be found [here][1]. If you have questions about this project, please contact us at manydogsproject1@gmail.com, or reach out to the project lead Julia Espinosa (jespinosa@g.harvard.edu). ManyDogs 1 pre-print: https://doi.org/10.31234/osf.io/4kncr ManyDogs 1 Protocol: https://docs.google.com/document/d/1IV2h2YXmyYpOw0U3IgxxQZD8zlkc0VHcencWx1fJm4s/edit?usp=sharing ManyDogs Manual 1: https://docs.google.com/document/d/1iuYElQSssoOMVC3nu7BLrFZovoM0TIEqmGM1bUaYbpo/edit?usp=sharing [1]: https://drive.google.com/drive/folders/1gbWCEno3xLjTE_x7rVkfwblA4t2L4ppN?usp=sharing