Should I be Concerned about My Dog?

I have noticed that my dog (a miniature poodle) leans her waist to her left side a bit when she runs or walks. It has always been like that, and I hadn’t thought anything of it until I realized that other dogs don’t walk that way. It doesn’t seem to hurt my dog at all and poodles are very flexible (she can stand and walk on only her back legs when she wants to) so that might have something to do with it. I still wonder if I should be concerned though. Does anyone know if something is wrong with my dog, and if so what should I do?