Edward Busuttil DVM CertAVP, PgCertVPS, MRCVS, shares a basic understanding of the composition of the horse hoof wall to explain its response to hydration in this nicely illustrated article. He discusses how the mechanical properties of the hoof are directly affected by high moisture content.
Source: theequinedocumentalist, January 11, 2023. Link.
Studies have shown us that both the tensile strength and hardness in the tubular and inter-tubular areas decreased significantly after full hydration . . . ideally, keeping their feet at a more constant state of hydration is best overall.”