I have tried searching for posts of shell problems here, however I can't find a good reference. So, I just want to make sure with you all experienced turtle owners what's going on with my turtle. I apologize if this is a repeated question.
I've been feeding my turtle pellets daily, no veggies yet because it didn't eat them after a week's attempt. Perhaps I've been over-feeding it. Its color is not as bright green as before and dark edges are growing from each shell piece. It's not as smooth as before as well. I don't know the right terms to use, so I'm just trying to describe them. You can see it from the top and side view photos.
Is there something wrong with its shell? Any sign of pyramiding? Is it even noticeable after 2 months?
Thank you all for reading
This is a top view:
Side view (rather blurry):
Another side view, notice the raised edge of the shell pieces:



