John Fischer, 75, was allegedly attacked by a Rottweiler at Glenn McGrath Oval, off Willarong Road, Caringbah, on June 21 last year.
The proceedings against the dog's owner Sean Fennell, 31, of South Caringbah, were brought by Sutherland Shire Council. The dog is not listed as dangerous.
Norma Fischer collapsed in the courtroom while Mr Fennell was giving evidence before Magistrate Harriet Grahame.
Mr Fischer told the court in evidence earlier in the day that he had walked his four-year-old border collie Harley to the oval from his Jacaranda Road home at about 5.30am.
Mr Fischer said he bent down to check his joggers and noticed Harley was "standing up looking to attention" before he started to jog clockwise around the oval calling for his dog to come with him.
He then described how another dog "absolutely savaged" his right arm in an attack that lasted about 15 seconds.
Mr Fischer said it was dark and the man who "appeared to have an English accent and was in his 50s or 60s" told him he was going to call an ambulance, but never returned.
He said when he sat up he saw another dog sitting about 30 metres away.
Mr Fischer said he waited about 20 minutes before going home and calling his daughter Helen who took him to Sutherland Hospital.
In evidence, Mr Fennell said he had visited his dying grandmother in hospital the evening before the incident and stayed up all night before taking his two dogs to the oval for a walk.
"Every time I've walked the dogs, they've been restrained," Mr Fennell said.
Mr Fennell said a man who was running around the oval, had passed him as he was walking along the path and a "collie dog, real savage" came "out of nowhere" and attacked his smaller female dog Bonnie on the back leg.
Mr Fennell said the bigger dog, Rommel, interjected between the two dogs and there was a "fracas" as the smaller dog hid behind his legs.
He said the man [Mr Fischer] ran out the gate and wrapped both his arms around the collie dog.
"Everything was moving and shaking. He had his arms in there for a few seconds," Mr Fennell said.
Mr Fennell said he asked Mr Fischer if he "was OK" but he did not see any injury and went home. "It was a non-event," Mr Fennell said.
Mr Fischer rejected this version of events put to him by Mr Fennell's barrister Paul Johnson under cross-examination earlier in the day.
The matter was adjourned until July 24.
(The Leader - May 12, 2012)
