If flaring is a common problem for the horse, she's either not being trimmed well, or she's not being trimmed often enough. Maybe a bit of both. Maybe also combined with low grade metabolic issues. If they're always flared on one side, that is either imbalanced trimming or limb/loading imbalance - she loads the outside of her feet rather than evenly. This would also be a reason for the frogs to be skewiff. If this has only been happening recently, I'd suggest perhaps the hooves aren't being trimmed balanced, imbalances aren't being addressed adequately so are getting gradually worse, &/or there is a body issue causing her to be tight/wonky, so a bodyworker may be a good move.
Which is not necessarily wrong, depending on specifics. The walls shouldn't be overgrowing the sole at the ground surface by much at all - a few mm if it's deemed necessary to leave them longer. Peripheral loading of the walls will also cause flaring.
Which is as they should be. Can't grow healthy frogs/heels if they're out of commission.
The flaring is most likely because of improper trimming. I've been looking for a good farrier for the horses, and before the one that had a heart attack, had never used them more than once. After he trimmed her I could tell she felt so much better. So she has been getting trimmed wrong up until recently.
She's been moving so much better since "M" (the farrier that I like, but had the heart attack) trimmed her. But after I had to use the other farrier, "D", all of the horses were obviously sore and tender, and limping on at least two legs.
Since she was shod on monday by "M" she's been back up to snuff, back to how she was when he first trimmed her.
I do believe that she needs to get trimmed more often then some of our other horses, as her and the gelding have fast growing hooves, and both flare a little. But the biggest problem was fiding a farrier we liked.
I've only had one other farrier come out twice, acually, and after that I was done. Because she fought him tooth and nail, because he was making her hurt. Whereas with "M" she will stand there, possibly fall asleep.
I may have explained it wrong, how they were trimmed to short. It was deffinately not a good thing.