The zebroid is a result of crossing a zebra and any other equine. From donkeys to horses, zebroids are primarily bred to get the best out of zebras, which are less susceptible to diseases, and horses, which are stronger and easier to train. Normally, Zebroids are picturesque and were first bred by Charles Darwin back in the early 19th century. The fact that horses have 64 chromosomes and zebras 32 to 64 depending on species makes zebroids a unique breed since scientists never know what to expect from the offspring.