Rereading your post actually made me wonder if the hatcheries doing this are using male chicks since it is hard to get people to take male chicks otherwise.
The sides of that photo look odd... regardless of whether that photo has been edited or not the practice of dyeing chicks does happen. I saw a video when looking for chirping chicks on youtube (trying to accustom my dogs to the sounds of chicks before they got here) and saw a video where the...