White and colleagues tested the gel in 129 horses, and he presented the results at the 2010 American Association of Equine Practitioners Convention, held Dec. 4-8 in Baltimore, Md.

Compared to normal bits, spiked bits sink deep into horses' mouths and cut their lips and tongues, causing extreme pain and lifelong damage. Rule 8 of the Prevention of Cruelty to Draught and Pack ...