I have a three year old thorough bred horses and her hooves are all cracked?? Have had the farrier out and he has said to just keep clipping and filing them??? Is there any oil or paste i can put on them??? Got told to use cooking oil[ paint it on the hooves] and the paste[ its a thick black paste] and it should help stop the cracks... How long could it take to get rid of the cracks?? There sand cracks... Can i continue to break her for riding while the cracks are healing??? Please help...