6 month old puppy with weird posture?

Okay, short history on my puppy. She was rescued from a home where she has been living in a cage her entire life. So when we got her, she was quite clumsy in her posture and even walking. Its getting better every day but right now I have noticed her back "knees" seem really close together when she walks and her front feet stick out like shes a duck. (duck feet) Is there anything I can do to help strengthen and straighten her legs? And also will she be suffering in the long run from this posture? I have an appointment with the vet next wed at 8:15am so please dont pull the vet card. Its a week away so I would like to have some suggestions as of what to do while I wait. Thanks! Will choose best answer!
She is around 25 lbs and evenly proportioned so luckily that's not hurting her legs
Thank you for all of the suggestions! I will defiantly be keeping a closer eye to see whats helping her and if she is improving! Any other suggestions are also greatly appreciated!
 
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