Dry Skin

[BOA68]

I just recently got a new Boa. I posted a small pic of her ealier. I got her from a pet store recently. She is just over 5 ft long. I inspected her at the store before brought her home and everything looked good except one thing. I noticed that she has one or two wut look to be dry patches. These are tiny patches of only about 3 or 4 scales. The scales almost appear to be caliced. Does this sound like something that might be normal and if not what should i do. Also since bringing her hom i have noticed that she has an odor to her. IDK why. Maybe the pet store wasn't cleaning her tank enough and she sat in waste for a period of time. Will this odor go away with time or a shed. Or can i do something to clean her. I have never experienced either of these two things with any of my other snakes in the past.