Board Thread:FarmVille (game discussion)/@comment-86.144.111.226-20130122111456/@comment-3474542-20130122215624

Yes, the wandering stallion has been effectively discontinued. However, there are several stallions that have been released since. Some of them were even available as quest rewards. If you have a shipping license for your other farm, you can transfer your stallion from one of that other farms to your home farm.