Jayden then had to stop him from strangling his mum and gouging her eye out. "There wasn't really room to be scared," he told AAP.
"We just had to get it done." While he was wrestling with Fields, 12-year-old daughter Kaylea Caulfield took her mum outside.
Zane Fields, who was just four at the time, hid his youngest sister Samantha Fields under the bed until police arrived and took their dad away.
It was these acts of courage that resulted in four of Ms Moore's five children being announced on Sunday as the recipients of Australian Bravery Awards.
Jayden and Cameron will receive the Star of Courage at a ceremony later this year, while Kaylea and Zane will receive the Bravery Medal.
Jayden said it was an honour, but he also wanted to use the recognition to help other children subjected to domestic violence.
"One thing that really helped me out in particular was counselling," he told AAP.
"It's mostly young boys and men who don't want to do it because they're like 'that's for weaklings, I don't need to do that'.
"You don't realise until three sessions in that actually you've got a problem and they work with you and start making it better." Ms Moore said she was proud of her children but sad they had to endure such a traumatic experience.
"They grew up overnight, it's pretty sad really," she told AAP. "They've had to take on so many other things around the house I can't do."
Ms Moore has had 36 operations on her arm since the shooting, but she remains permanently disabled and likely requires more surgery.
The Brisbane Supreme Court heard during Fields' sentencing in October 2016 that he intended to shoot Ms Moore in the chest, but she moved before he fired.
Fields was sentenced to 12 years' jail for her attempted murder, but he will be eligible for parole after serving eight.
Ms Moore said more support services like removalists and people to help with pets were needed for women who were victims of domestic violence. But she also urged parents and authorities to pay more attention to children.
"Parents need to be looking and listening to their children when they're scared," she told AAP.
Where to get help:
• Lifeline: 0800 543 354 (available 24/7)
• Suicide Crisis Helpline: 0508 828 865 (0508 TAUTOKO) (available 24/7)
• Youthline: 0800 376 633
• Kidsline: 0800 543 754 (available 24/7)
• Whatsup: 0800 942 8787 (1pm to 11pm)
• Depression helpline: 0800 111 757 (available 24/7)
• Rainbow Youth: (09) 376 4155
• Samaritans 0800 726 666
• If it is an emergency and you feel like you or someone else is at risk, call 111.
"Their voices need to be heard."