Hey guys,
Thanks for the input. I've noticed that Kiba has a very visible waistline, and her belly line is less pronounced, but it's there, so I don't think she's all that overweight. I can feel her ribs if I come back to front, and if I squish down her fluff, they're there. I think I was being paranoid when I posted this originally.
Anyway, she's been getting tons of exercise since I've been home for winter break, so that should be good no matter what.