The adult P. horses are Phoenix (the stallion, easily identified by the freeze brand on his neck), Magda, Alexandria, Alicia, Taschi, and Kitana.
Last year's foals were Solstice (0.1 - born to Magda) and Nikolai (1.0 - born to Alex), this year's foals are Napoleon (born to Alex) and Genghis (born to Magda). Alicia also had a foal this year that did not survive.
Quartz; with the lion-tailed macaques, we are waiting for two males (Dave and Guntur) to find homes in other zoos before we breed again. Our group is genetically valuable, but space issues prevent breeding right now.
Indian rhinos - as you said, we have to wait for them to mature
White rhinos - we only have one female right now (Shaboola) - she is a first-generation captive born animal (both her parents were from Africa). There are plans to bring in more rhinos soon, in the hopes of breeding.
Hyenas - two neutered sibling males do not form a good breeding group. Not sure of the future of this species at the zoo.
Savannah the sable antelope is still pregnant; it could be a few weeks still until she has her calf. Sable aren't endangered in the wild.