Often this is connected to a food intolerance.
You might want to read about inflammatory bowel issues here
http://www.marvistavet.com/html/inflammatory_bowel_disease.html
and here
http://www.vetinfo4dogs.com/dcolitis.html#Treatment%20for%20Colitis
I would suggest trying a swap to a food such as Wellness or Eagle fish, duck, rabbit, venison etc and no commercial treats and maybe even a swap to a heartworm med with no beef in it to see if that helps.
You may also find adding extra plain canned pumpkin or cooked sweet potato to her meals for the fiber will help.
Allergies do show up in goldens as do thyroid problems and both are partly implicated in this problem.
Hope this helps you!
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