People are finding gradually more Horse code.
All the horses in Sims 3 were really your standard racehorse type with occasional frills, a walking bicycle. A few variations, but nothing distinctive. I wonder if Sims 4 would have strikingly different breeds, like the hulking Shire, the graceful Arabian, little ponies, and donkeys.
I also wonder like, would you build stables? Would horses be allowed in your homes? Horse sicknesses? Dressage and show-jumping? Horse-riding skills? With such an untapped potential from Sims 3, I surely beg for horses.