Once I have more of the second cat blocked in, I'll revisit the section just above her ear to see if I need a greater separation between the two cats.
In 2009 I had the good fortune to spend some time with a pair of mating leopards in Kenya's Masai Mara. It is such a rare occurrence to see two adult leopards together. The three of us (guide, one of my collectors, and I) were very careful not to interfere with their normal behavior. Below is one of my reference photos.