She sits in a room in Melbourne where witnesses relive painful memories as they tell their stories on camera – broadcast into court where their attackers are sitting.

Therapy dog Coop remains out of sight of the camera, but is trained to respond to emotion and can comfort the witness with a cuddle or lick of the hand.

K9 Support trainer Tessa Stow works with Coop and other support dogs out of her Benalla base and has advocated for their full-time use.

Attorney-General Martin Pakula and Office of Public Prosecutions solicitor John Cain announced on Friday the pilot program would be extended.

One woman, who can only be identified as Penelope for legal reasons, has given evidence twice in court.

The first time she was so overwhelmed she was unable to focus on the questions. But the second time, she had Coop by her side.

"The moment Coop came running in she went to me and it felt more special than anyone else there because Coop was there just for me," she said.

Penelope said she was fine for the first 10 minutes of questioning, but when anxiety struck she began patting Coop, which relaxed her and kept her focused.

"My attention was on Coop and it pulled me out of the situation so I was able to focus on the facts and not the emotions."

Mr Pakula said the unique program helped make the court process a little less stressful.

“Support dogs create a calmer and more comfortable environment, helping to make the whole process less traumatic,” he said.

“I commend the OPP for extending this program so that Coop can continue to provide support for those who need it most.”

Mr Cain said the OPP was open to anything that makes giving evidence easier.

“The program has been an outstanding success so far, with early results indicating witnesses with Coop’s support have been able to get through their evidence more quickly with less need for breaks,” he said.