The bullnosing is much more pronounced on that 3rd pic of the white hind. I can’t tell, in the last set of pics (the older ones) whether that RH (in forward flight) is bullnosed, or just rounded off from rasping and/or abrasive footing. But it doesn’t look near as bad as the current profile, which is clearly a bullnose caused by the trim, since the convex profile goes way up the foot.
The good news is you don’t have to pull shoes to fix these things 
Competent trimming, with properl application of shoes, and a wedge if necessary on those hinds to properly align things temporarily if the trim alone can’t do it, will have things going the right direction immediately.
Those big wide rings do point to ongoing disruptions of the growth - lamintis by definition, even if it never caused him to be sore. But if he was sore, it looks like it would have been bilateral, so you’d have been hard pressed to know.
