Thank you! And yes I did. I shot in raw and ramped up the exposure and set the blacks to 0 (I probably did some other stuff too, but those were the most important) to give the black cat some sort of discernible texture, this resulted in the rest of the image becoming overexposed and washed out. I then opened the image as a smart object (hold Alt in Adobe camera raw), made a copy via smart object, then re-opened the copy in camera raw and adjusted it the way I wanted it. I rasterized both layers and then used a mask to lightly brush shadow detail into the black cat.
It sounds like a lot of effort for very little visible effect... and you'd be right! But black fur is such a pain to shoot.