Bob,
nice job. You can tell these were not easy -- only one set of "ears" in the group shot which I assume is a collage.
I'm beginning to think that when folks want "group" formals, I'll let the dogs run around together outside and take candids and then put it together into a collage afterwards. You miss the lighting control but you get so much more personality of the dogs and they tend to be more relaxed. Assuming they can be run together

.
I'm kinda thinking out loud on this since I have a group shot scheduled for next week and the owners says the dogs have no training whatsoever. Sigh. More Valium.
The overall lighting on these is great. You did a good job with tough subjects.
Jim