A visually-impaired woman says she's heart-broken, but will have to find a new home for a "best friend" — her guide dog Dexter.

Regina's Jacqueline Rennebohm has a form of macular degeneration and can't see further than two metres.

She needs Dexter, a German Shepherd, to help her get around at work and around the city.

"I rely heavily on Dexter," Rennebohm told CBC Morning Edition host Stefani Langenegger. "He has a huge role."

However, the specially trained pooch has been through a rough patch, she says.

'There'll be tears. It's very, very difficult.' —Jacqueline Rennebohm prepares to say farewell to Dexter

While on the job, several dogs jumped on him, and now he's distracted and is having trouble keeping his focus.

That's creating a potentially hazardous situation for Rennebohm as she navigates the streets.

Reluctantly, she's giving Dexter up, sending the four-year-old into early retirement.

"He's also my best friend," she said. "There'll be tears. It's very, very difficult."

Rennebohm described Dexter as a calm, highly social dog who loves being around people.

The ideal setting for him would be with a loving family who could give him lots of exercise and allow him to stay indoors.

She said people can email her at jrennebohm@gmail.com explaining why their home would be right for the dog. She would also like to visit Dexter from time to time, she said.

Meanwhile, Rennebohm has started the process of looking for a new guide dog.

"It feels horrible, filling out an application form in Dexter's presence," she said.

She said she'd like to keep Dexter as a pet, but it would be confusing and unworkable with another guide dog in the house.