There have been times when there have been fears of losing this revered family member.
'Subbie' has had some occasional bouts of bad health, including a recent one.
The prospect of the horse's possible death, forces Salisbury to tears. "Sorry, I get pretty emotional thinking about that," he says, his voice cracking. "I just hope I go before him."
Subzero's most serious problems came in 2009 when chronic arthritis took hold on his aging bones.
Salisbury managed to rectify the problem with an American medication called SuperFlex and the introduction of it to Subzero's diet immediately rectified the problem.
But a problem occurred when the next batch of medicine was refused entry into Australia because of insufficient paperwork.
Salisbury persevered but failed to get that overturned, his condition deteriorated and there was talk of him being put down.
It led to such a public outcry and the intervention of then Prime Minister Kevin Rudd.
"I knew the then attorney general Rob Hulls and so mentioned it to him," says Salisbury. "Then the permit I needed appeared suddenly. I rang to thank him but he explained the Prime Minister was the one that kicked up a fuss and got it sorted."
It has allowed Subzero to return to what, seemingly, he loves best -- namely entertaining his adoring fans, of which there is a long and varied list.
"I had some lads come up to me and 'Subbie' the other day," says Salisbury.
They said they remember him coming to their school when he was kids. And then there's the sick kids in hospital whose faces light up when they see him. He's affected a lot of people's lives."
Some of Australia's brightest stars have even grown enamored after coming face to face with the equine superstar.
"I remember doing a charity thing at the casino with Jackman," says Salisbury looking back.
"I remember he said to me 'am I going to be OK on him?' I was like 'he'll be a lot better than those horses you rode in that film Australia.'
"Jackman's a big, big star but even he had to admit that he people were taking more photos of 'Subbie' than they were of his cabaret.
"It was the same with Kylie. She was with him at the Adelaide Cup some years back. OK, she wasn't the global star she is now then but she was still a massive star in Australia. She said 'I'm not used to being upstaged by a horse.'"
His brush with celebrity, in fact, has only endured one rare blip, when he ate the $600 hat of the socialite Lillian Frank.
"I've not had one problem, from having a family of four on his back, to getting on a plane or being patted by kids in a hospital, he's done it all without a fuss," adds Salisbury.
His feats have been enough to warrant his own race meeting, held in Melbourne in October, and all manner of adulation, which with his health restored looks likely to continue for many more years.