API Photos
From Golden Retriever Wiki
Each data object returned from the Data endpoint will contain a comma separated list as the value for the key "Photos". These are the ids of the photos.
You can download a photo from a dictionary using the following example:
curl -X GET -H "Content-Type: application/json" -H "authorization: <api_key>" "https://api.thedog.io/photo/{Dictionary_no}/{Photo_no}" -o photo.jpg
The response will be the file photo.jpg