There is one named 'Horse Peack' try joining that one, there are another 3/4 maps being added to it but it's for wild horses. It accepts humans, cats, dogs, horses and rabbits, the maps i think she is adding to it is Horse Creek, The City and Bright Hoof Ranch. She is also adding Cougar Cliffs that accepts; Cougars, Crocs, Mustangs and prey for the cougars, but none of these animals will be allowed in any of the ranch maps they have to stay at there present map and can attack the riders+horses that go there for hack with permission. Anyhow you should try it.