I agree diet can definitely have an impact but in my experience the #1 influence of the health of your horses feet is the quality of trim he is getting. Even if the horse has the best diet he possibly could if there is white line separation or cracks that aren’t being addreessed you will have problems.
To start, if you haven’t already, I would recommend soaking his feet in White Lightning several times. This will kill any bacteria inside the foot that you can’t get to with topical treatments. Their website says you can also use it as a preventative and soak once a month, although personally I would rather find out what’s causing them in the first place and change that.
I also have found that abscesses seem to heal better if allowed of pop on their own rather than having the farrier dig them out.
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