more eyes that have looked at jim crow

Just looked again at the photographs in my previous post about the early-20th century African American photographer Michael Francis Blake - was struck, suddenly, by the strange elision of dogs in that post. When I talked about the "eyes that have looked at Jim Crow," I was implicitly talking only of the eyes of the human beings in the pictures. Is it nonsensical to think of the dogs as also having witnessed segregation? To ask what racism among humans look like to dog - or perhaps, more apropos, what it smelt and felt like?