She has longish, bit flared capsules & rather shallow looking soles at the front(tho it's hard to really tell only with straight-on pix). She has had frequent metabolic upsets for at least the last year, as evidenced by the rings on her feet. She is consistently sore post trim on hard ground, despite the trimmer not trimming too short into the sole or such. While none of these symptoms are necessarily evidence of laminitis, all added up, I think it's very possible her suffering ongoing mild laminitis could be the issue.
No, I don't think the dark patches on her feet are anything except pigment, if you mean around her toes. Tho the left inside & the right outside quarter/heels look a bit messy.
I've also been told that the rings can indicate "the L word" but I really feel like they might just be nutritional, in Lacey's case, because last year when she was on fresh pasture that hadn't been grazed by horses in years, the rings completely grew out and disappeared
Yes, they possibly could be due to a nutritional deficiency/imbalance, but this tends to show up in other ways, such as generally poor condition of hoof walls & coat. Laminitis is due to metabolic upset, generally dietary. Toxins, cortisol, a reaction to insulin resistance, etc, causes inflammation & damage to the laminae, which if mild can just cause very minor breakdown in the laminae/hoof wall at that point, which causes a prominent 'growth ring' or ridge. Serious metabolic 'events', such after an insulin resistant horse being plonked on rich spring grass or a horse breaking into the grain shed & pigging out, reaction to medication, hormones, etc, can cause a serious breakdown of the laminae which can lead to separation/mechanical founder. This can also happen when chronic or mild cases aren't managed properly.
I'd think it's more likely to be the sugar content in the different grazing(& perhaps whatever else she gets) that is more likely the issue, &/or her body condition considering what she's grazing. Check out safergrass.org for more info on diet as it relates to feet.
The trimmer is due to come out tomorrow and do Lacey but
Be interested to see some post-trim pix & hear what she has to say.
Of course it could just be a wrong perception I get from the pics, but her frogs do look like they could be a bit thrushy. Whether they are or not, the toe wear(is the wall at the toe level with the sole as it looks?), lack of wear at the heels and bit contracted, messy looking frogs indicate her heels are probably a bit too weak & sensitive to support heel first impacts. So I'd be inclined to treat her for thrush and also use hoof boots with frog support pads when riding on hard ground for the mo.