They already have redeveloped that area in recent years with the addition of some other paddocks and some new barns to accommodate the new asian elephants as well. A new large cow barn is planned for the coming years as well.
Expansion of the current precinct is difficult as the enclosures surrounded in most directions, but there is a fair chunk of space above the zebras. I guess Dubbo will ultimately need to consider whether they actually require an expansion; as obviously they don't at the moment. If they elect to have a breeding herd of the size they do now, they wouldn't require additional exhibits imo. It's a real toss of a coin.
Keeping the bull with the herd is a very unnatural thing that is done; and I'm not sure of many zoos that actually do this. Most (if not all) zoos keep the bulls separate from the cows and calves as they can be disruptive to herd dynamics. For that reason, I doubt any of our regions zoos will look to pursue that going forward.
A keeper I talked to also mentioned the bulls having the opportunity to share space with the matriarchal herd too which I found interesting. Although the whole complex can be divided into smaller sections, the keeper stated there was a hope that these dividers would only need to be used occasionally - interesting idea.
While bulls themselves don't live entirely with matriarchal herds in the wild. Most matriarchal herds have bulls in and around them in the wild quite a lot. It's good to see that they are trying to replicate this sort of dynamic. With bulls being more like loosely tied members that can come and go. Which again mimics that more natural dynamic of when elephants in the wild congregate in large numbers. While also having the facilities to seperate them back out mimicking that natural gathering and separation that they have in wild populations.
Not to mention it will be miles better for the bulls to have more interaction with each other and with the matriarchal herd. Both from a social and enrichment standpoint. Then just keeping them seperated by themselves. Especially when we know that they are social animals and males do form loose coalitions in the wild.

