Ginger beat me to the link regarding the HUGE movement to do glamour shots for shelter pets.
The shelter movement in general is moving away from 'need' messages to highlighting the sweetness of adoptable pets. The practice is increasing success percentages exponentially.
Theresa Berg is on the forefront of this movement. She teaches both amateur and professional photographers the ins and outs and offers a lot of free support.
Also, Tom, a local photog in this area does loads of high-end photography with families and pets using natural lighting exclusively. No studio...she says she prefers to capture people's pets (and kids) in their natural habitats. She did shots of my former bf's husband and Shih Tzus that are just lovely.
I have to say, I'm unspeakably grateful for the studio shots I had taken of Bartleby and myself not long before he died. Still, he was nervous in that environment and I can see that in the photos. I so wish we'd done something at home.
Anyway, given the quality of the white dog photo (and your other stuff, of course) I don't think you'd have to do a whole lot of uncomfortable extroversion stuff. Especially since you've already been 'published.'