Equi-Block DT is a cost effective daily treatment for horses with chronic pain that requires a longer period of time to treat hard to block areas such as hoofs, stifles, whorlbones, hocks, etc. Q: What is the difference between Racehorse Strength Equi-Block and Equi-Block DT Formula? A: Equi-Block DT Formula is a secondary treatment to Racehorse Strength Equi-Block. It was formulated as a cost effective daily treatment for horses with chronic everyday pain in hard to block areas like hoofs, stifles, whirlbones and hocks that require more Equi-Block gel.