The stallions are on their summer break, so the SRS switches to their Piber Meets Vienna program where they showcase their broodmares and foals and give info on the breeding program. Info about that is on their website, of course.
But, in addition to the official program, every afternoon from 5 to 6 (when the weather is good), the mares and foals are walked over to the Burggarten and turned loose in part of the park. Their handlers are standing by to keep an eye on things and will answer questions. Anyone can stop by to enjoy watching the mares and foals just being horses.
Details here:
http://wien.orf.at/news/stories/2783575/