It’s not easy being a black dog. Many people do not like black dogs. Light colored dogs get adopted at the rate of the 3 to 1 against the black dogs.
One of the reason that black dogs are badly viewed is because of Hollywood. Whenever they need a big, mean dog, it’s always a black dog. Occasionally it’s a very, very dark colored dog. Now they select the dog and change the color of the dog to black in post-production (ie computers) to make it more menacing. The colour Black is supposed to be the colour of evil and/or misfortune.
Black dogs also take longer to get adopted than lighter colored dogs.
BTW, brindle colored dogs take even longer than black dog to get adopted according to the US SPCA.
Photographing a black dog is difficult because black is not a colour. Black is a lack of colour. I need to show some details in the blacks or the dog would become just black blob.
To show the black dog, I use contrast by have the black dog against an other colour that can contrast the black, then I can open some the shadows and the blacks to give it some details and people perceive the dog as black.
Camera: Canon 7DMkII ISO 1250 and 1/250
Lens: Canon 70-200L/f4 @200mm and f/5.6
Processed with Darktable 2.4.1: http://www.darktable.org/