There are several reasons why horses develop cracks in the feet. Sometimes it's because they go through wet/dry cycles. Old timers used to feel that letting the water tank overflow, and having the horses walk through some mud was as good as hoof dressing. But what are your hands like after a single day of going in and out of water? Pretty dry, eh?
There are lots of different commercial hoof dressings available. IMO the best ones are loaded with pine tar, but plain old cheap margarine will work, too. What you need is something to be a moisture barrier. Depending on the condition of the feet and the footing they're on, you may need to hold moisture in, or you may need to keep moisture out. I once knew an eventing horse that suddenly went through a time where it was constantly throwing shoes. With a little research, it was found that the groom was slopping on lots of hoof dressing immediately after the post-workout bath. When she changed the hoof dressing use to
before the bath, the thrown shoes stopped. She blocked moisture out, instead of holding it in.
There are also some really good hoof supplements out there. Remember that biotin is only one of the many nutrients needed to build good feet. Others include d-methionine and dietary sulfur. If the feet tend to spread and fray, then sulfur is almost always deficient. Sulfur is the mineral that gives strength to the microscopic bonds that hold the tubules of horn together.
Since dietary deficiencies vary according to the quality of the forage and the digestive capacity of the individual, different supplements will work better on one horse or another simply because they have different recipes. One that's considered the very best out there is Farrier's Formula. I had a gelding on the loading dose of Farrier's Formula for eight years, and I still had a horse with brittle, chipping feet. If he pulled his shoe, he pulled it out from the clinches down, and that demanded a lot of repair work with acrylics. So I switched him to one called HOOF made by Advanced Biological Concepts. WOW, what a difference! I put him on the maintenance dose and within about four months my farrier commented on the improved resiliency and texture of his feet. I still have that horse, and he's still on HOOF. It's a top quality supplement, yet so is Farrier's Formula. The HOOF recipe was simply more along the lines of what that particular horse needed.
Different horses will have foot challenges because of illness. A previously foundered horse will have impaired circulation in the front of the foot, and it alters the pattern of growth. A horse that has been injured at the coronet band can also have impaired circulation. Horses with allergies have unusual demands for certain minerals, which leaves them deficient in nutrient supply for feet. Abscesses can cause an interruption in the formation of horn if they blow out the coronary band. Normally this will resume horn formation after the abscess has been drained.
Horses can also have bad feet due to genetics. Some are born with thin, weak walls, and as they grow, the horn is smashed under the horse's weight. Some are born with thin soles, and never seem to lay down enough sole to keep them comfortable on anything but the softest footing. Some poor souls are cursed with both. They also tend to have thin tails, thin manes, and fine, tight haircoats. You see this a lot in TBs.
But here's one of the biggest reasons for cracks: Uneven loading of the foot. This can come from a conformation problem, lameness in the other foot, too much time between trims for that individual, or plain ol' bad, imbalanced trims. It takes a good eye for biomechanics to look at a horse and evaluate the way it stands, the way it moves through all the joints from the shoulder and hip down, the way the foot strikes the ground, bears weight under the column of bone, breaks over, and takes flight again. Too many farriers look only from the knees and hocks down. Some use a cookie-cutter approach and make all feet look alike. Horses are individuals, and all have their own particular needs for foot care. Sometimes a horse can get along fine with an unbalanced trim, but problems show up when injury or lameness happens.
Bojack08, you don't mention if this abscess broke on it's own, or if you had the vet come out and drain it. Just for future reference, and for those who are new to abscesses, they tend to cause very sudden and acute lameness which can be easily resolved, and very quickly. Abscesses form in the feet as a result of stepping on something such as a nail or a sharp piece of wood, or even from a bad bruise on a rock or hard, uneven ground. Microscopic fissures form in the sole and bacteria gets up inside, where it replicates. The body attacks the bacteria and/or any foreign object introduces, and forms a pocket of pus. It hurts like the devil because the hoof capsule is rigid, and there's no place for the swelling to go. When you call the vet, he'll put hoof testers on the horse, carefully squeezing the heels, the quarters, and toe of the foot, until he finds the painful section. Then he'll gently pare out the sole along the white line (on the underside, close to the horn) looking for a distinctive dark spot. He may actually drill aggressively in this spot with his knife, perhaps even drawing some blood; but he has to find the abscess and relieve the painful pressure. When he does, it can squirt pretty hard! The fluid usually stinks to high heaven, and the horse feels instant relief due to the release of the pressure. The vet continues to pare out the hole for good drainage, then packs the hoof with cotton soaked in betadine or in a sugar/iodine mixture (known as sugardine, which has excellent drawing properties). Then he bandages the foot with sheet cotton, then vetrap, then duct tape, and sets down the foot. You can leave this bandage on for three or four days, keeping it dry and reasonably clean, and in ten days, if the horse is sound and the infection cleared out, you can shoe the horse with a pad or ride in a good quality boot, and chalk this up to experience. Letting them blow out the top takes longer to heal, is very painful, and often has more complications. But hey, it happens sometimes, even with the most careful and alert owner.
And if you got through all this, you're very tenacious.
