That crazy/mean/weird farrier that came out to trim (and beat) my horses had mentioned something about Joey's little chronic crack he gets on his front right hoof. He said that more often than not, a chronic crack on the same hoof in the same spot means there is actually a small chip in the navicular bone just behind that spot.
He recommended I get X-rays done to see if that's what's causing it... but offered absolutely no "solution" to curb the crack from spreading (when I KNOW there are ways to do it.. again, I really doubt this farriers credibility). Now, I will note, he did not examine Joey's angles or so much as look at him before he started trimming his feet. So its not like he took a good hard look and ruled other causes out.
I always figured the reason Joey gets cracks on the front right, is because he is club footed on that particular foot... and the pressure on the toe causes the hoof to crack. It never splits -too- deep, usually just... 1/8th of an inch into his hoof wall... if that. I'll try to get pictures of his sole tomorrow to show you what i'm talking about.
I wish I had pictures, but the ones I took were awful! So im hoping some of you guys could throw out some ideas as to why he keeps getting this crack. Something missing from his diet? (the other horses don't crack, and they get the same feeding regiment he does). The steep angle of the Club Foot putting pressure on his toe causing the split? Chip in Navicular Bone?
... Help! :p