
Hi Gloria, this is a form of IBD (Inflammatory Bowel Disease). Try this
LINK it has helpful information on management and diet and also a dedicated Group which you can join and share experiences and gain info from members world wide with dogs suffering the same specific problems.
In the meantime I'd change away from rice - grains often exacerbate the problem, commonly rice. Also duck is very fatty - perhaps try and find an alternative
novel protein (something your girl has
never eaten before) perhaps rabbit, venison or salmon.
You don't mention meds - if none are currently being taken, speak to your vet about something to sooth the gut tract and increase absorbtion plus using an initial high dosage cortico-steroid to reduce the inflammation. Good luck and best wishes, Teri