It was referenced a few times back in the early documentaries. I think of memory they even send some of the larger male crocodiles to farms for breeding. If they were not into the farming industry in the early days, why in the doco's were they egg collecting and actively breeding crocodiles on site. The early documentaries they literally show grow out ponds where they move some of there keepers out onto display. Zoos in australia have never had to breed crocs or create sustainable populations in zoos.
"Oh they collect eggs, used to breed a little bit, and keep animals off display, they must of been running a highly profitable crocodile farming operation" is quite frankly a baffling conclusion to jump to.
Australia Zoo collect eggs so they DIDN'T breed. Males and Females are kept together for space, socialisation and education purposes, which naturally results in several hundred eggs a year. If left in the enclosure, many, if not most of those eggs would hatch. They are collected and then simply not incubated, meaning the embryos inside never get a chance to properly form.
On very, VERY rare occasions in the early days they'd incubate one or two eggs to better stock their incredibly small collection. Even if they were farming crocs behind the scenes (and they weren't) the absolutely miniscule number of crocs they hatched, plus the cost that goes into raising a croc to be farmable size means it would be anything but a profitable operation.
Australia Zoo has many animals off display. So does quite literally every zoo on the planet. Those animals off display include several Saltwater Crocodiles, who are incredibly large animals who need to be housed solitary in sizable exhibits. They quite literally do not have the space to scatter 2 dozen or so Saltwater Crocodile exhibits around the zoo.
Crocodile breeding is not excessively common within Australian Zoos, with most doing as Australia Zoo does and removing the eggs and not incubating them, but where do you think the dozens upon dozens of both Saltwater and Freshwater Crocodile hatchlings housed at countless zoos across the country came from? Do you think 15 centimetre Freshwater Crocodiles are being deemed problem animals that need to be removed on a regular enough occasion that there's a steady supply of them to fill zoos and travelling animal encounters country-wide?
I would love to know what doc you got them sending crocs TO farms came from. Several of their crocs came FROM farms, and I know of at least one doc off the top of my head that covers that. Crocodile farms are significant operations, and with how many eggs are laid in a single clutch, you could get up to 60 hatchlings a year from one male. In the incredibly unlikely occasion where a farm is in dire need of more males, dire enough that they cannot wait to raise up their own juveniles, it would be significantly easier to go to any number of rinky-dink facilities or other farms, rather than large, well-known, accredited zoos known for hating their very existence.
Terri, Steve, and his parents before him, were and are all incredibly vocal in their opinions of crocodile farming, and none of those opinions gel with them sending crocodiles to farms, let alone operating one themselves.