Here is more information about my rug in progress from camp and some of my hooking decisions and reverse hooking issues.
By the time camp ended I was this far along (immediate photo below) on the rug and had just finished adding the dark area (rock ledge) where Gracie and Piper are sitting. The wool I used for this part of the rug looked good in contrast to Piper's dark little behind when you saw it up-close. But this is one of those lessons learned: stand back from your rug. Once the rug was in the distance there was not enough contrast between Piper and the dark ledge. You can't always tell if there will be enough contrast until an area is hooked because your eye is distracted by the lighter color of the linen around your motif area. So yes, I do reverse hook often to achieve the look I want in my rug.
To avoid reverse hooking this entire area, I first tried my "peeping" trick to place a narrow cut of light wool between his left leg and the dark ledge wool (you can sort of make this out in the photo - the narrow light line). It adds just a slight separation of the similar colors, but in the end, not enough in my opinion. Sometimes this technique will work, sometimes it won't. In this case I felt the contrast was still insufficient. In the picture below the contrast looks like it may be sufficient, but it wasn't when you saw the rug in-person from a distance. Corgis have the cutest butts, and I am capturing the world famous corgi butt here so it must show up or part of the charm is lost. So I decided to reverse hook this area.