Hi & welcome hrosec,
She is not ribby. Agree with verona & after the last pics I'm sure she's not too thin. If this is 'ribbier than you like' I suggest you may be too used to fat horses & not aware of the health implications. It's also important not to just notice ribs but look at the whole horse overall.
Yes xxdanioo, her feet do need attention.
Lol, ok, a few of my fat horses. The solid paint is not shedded out, only about 1/2 way there in the picture, and I agree with you there loosie, my daughter says he is too thin, the reason why he hasn't shedded yet. I disagree with her, he isn't thin, he is in good shape, still shiny with the remmants of his winter coat (its gone now, finally!) and ridden almost everyday Picture 445.jpg
Now the next picture is of my husband's horse, he is a bit fat, as my husband doesn't ride as often as I do, so I ride his horse (the solid paint's sire) about 4 or 5 times a week, however he gets the same feed as his son. My daughter thinks this horse is in perfect weight and the reason why he is shedded out already. I doubt that, it's because he was a breeding stallion and retained the testosterone which I heard makes them shed earlier. Either way, I don't like to see horses with a scruffy coat, winter or summer, and no ribs, feel them, yes, clearly visible and countable, NOT. Whether the OP's horse is thin or not, I don't really think so, but the horse's nutrition and health care should be revamped, I would not find that acceptable if her horse was mine. Picture 446.jpg