He was said to be "very upset and shaken up" after the incident last June 9 on a country lane in the village of Plumley, near Knutsford, Cheshire and he went to hospital whilst vets carried out almost £2,000 (NZD$3,853) worth of surgery to save Dougie.
Southern, 42, who runs her own mobile beauty salon left the scene without giving her name but was traced after Mr Gabbott's daughter posted an appeal on Facebook.
She had ignored a court ruling two months earlier to keep her dogs Bear and Carly on a lead and muzzled in public following a previous incident in which another man was bitten.
Prosecutors believe she had deliberately taken them for a walk 10 miles from her home in Winsford, Cheshire in the hope the animals would not be recognised.
At Chester Crown Court, Southern admitted owning a dog dangerously out of control causing injury and was sentenced to 12 months jail suspended for two years. She was also ordered to pay the vets bills of $3,522 plus $1445 compensation to Mr Gabbott and was banned from keeping dogs for life.