I'm having such a hard time deciding on which pictures to send!
It can be so so hard to decide!! Just think of what expression you really like in your dog, for example, if I ever get to doing Zoot's portrait, I will probably use a shot of him where he looks very dignified, serious, and soulful. In fact I think I just found the perfect picture of him to use! The best shots are taken outside in natural light so there is no weird flash effect in their eyes, but some indoor shots work well too.
Something that shows their face and markings, their color, and then the right expression.
Yep, it's difficult! But it's fun!!!
Here's that pic of Zoot I just found which is a good example of a photo that would work really well for a portrait. Hope it helps!
(Any questions just email me!)