The Rotograph Co. was located in New York city and published thousands of postcards from 1904-1911. This set may have been one of their “unique small card sets.” These cards were never mailed and were probably purchased by Aunt Bunny for her collection. Much of the color has faded from the images, as you can see and what appears to be white around the edges is silvered on the actual cards, probably residue from the photographic process used in producing them. For more information on these and other postcards, check out MetroPostcard Publishers.
I love these cute little chicks, but I would not want to have the job of dressing them up and posing them as has been done here. Enjoy!