Ms Donne said there was growing evidence about the benefits of assistance dogs for those with PTSD.
The Kotuku Foundation has trained the only two PTSD assistance dogs currently working in New Zealand and there are two more in training but none have yet been trained for the specific needs of combat veterans.
Ms Donne said it had always been her aim to develop a specialised programme with returned service personnel.
"I have a head injury and PTSD. My grandfather was a squadron leader in the RAF and my father was a Ghurka so I do have very personal insight," she said.
German shepherd Rika is Ms Donne's own assistance dog who travels everywhere with her.
Dion and Frances Taka are working with the Kotuku foundation to find a suitable dog for training and it may be a puppy or a young adult dog.
Once the right dog is found, training would take six to 18 months.
RSA Wanganui manager Kyle Dalton said all returned services personnel who had been involved in combat were likely to experience some level of PTSD.
"There are different degrees of severity for everyone and some people will need more support than others."
-Proceeds from local poppy sales support Whanganui veterans and a $3 donation can be made to the national fund by texting POPPY to 4662.