As for pics, google seedy toe or white line disease & choose images on the left panel. Or check out Seedy Toe - Help!
'Seedy toe' is an opportunistic infection, can be bacterial or fungal, which gets into unhealthy hoof tissue, essentially the same as thrush. It can appear as anything from a hairline crack in the wall at the ground surface, to big gunky messes and can be superficial & addressed in one trim or deep & requiring major resecting & ongoing treatment between trims. The white line should be tight at the juncture of a solid sole & wall. Any crumbly or gunky material is infected tissue.
You're right that mechanical stresses such as long flared walls are a big factor in allowing the infection in. So I'd put no. 1 priority as getting a *good* farrier/trimmer.
I would post picture but honestly I'm embarrassed because I didn't notice how bad they really are, I always thought of a farrier like an y other professional, you don't go telling your doctor whats wrong and how to fix it, right?
Pictures would be helpful if you want any specific advice. Don't feel embarrassed, there's plenty in this world we all don't know & have to take 'expert's' word for. Good on you for wanting to learn better. That can be the key to finding & recognising a good or bad farrier.
Yes, like any other professional, it doesn't tend to go down well when a client tries to tell an 'expert' how to suck eggs
. But like other professionals, there are good, bad & indifferent practitioners & a range of different opinions, so if it's something important to you, I think it's very important to do your own homework so you don't have to just follow blindly though. And questions about the whys & wherefores, put reasonably, shouldn't upset any professional & will help your self education too.
Got another question, can thrush really be caused or bothered by long heels and no frog/ground contact? ....If her feet are being forced to point out, could it be causing her pain her in her hip?
Yes, thrush/seedy toe are opportunistic infections that infect compromised tissue. High heels & 'sad' dysfunctional frogs are one recipe for attracting thrush.
Yes, imbalanced feet are connected to the legs, which are connected to the body...
so imbalance in the feet can certainly cause body issues, & vice versa.