Duck is not "better" than chix or lamb. And potatoes aren't really much "better" than corn, wheat, or rice. The thing is that they are not common ingredients in most pet foods, and therefore there is less of a chance that the dog has had a chance to build up allergies to them.
Although some dogs do have actual problems with the protein source/ meat it is FAR more likely that her allergies, yeast, etc. (all the things that can lead to icky ears) are being caused by the grains in their normal dog food. Dogs do NOT need grain in their diets.
If it were me, I would immediately put the dog on a completely grain-free diet. I would go raw- aside from it being healthier I find it MUCH easier, but there are grain-free cooked recipes out there. When cutting out grains, this also means don't feed any dog treats that have grains in them.
She should start with a single protein source (chicken or pork or duck or lamb, etc but only one of them) for the first two weeks or so and see if things improve. If they do not, then try two more weeks with a different meat, but again only that one. Remain grain-free. When things get better then you know you have found a "safe" meat.
Then start introducing other meats one at a time and look for recurrence of problems. Remain grain-free. If there are problems then you know the newly introduced protein source is to blame so put it on the no-no list. Continue this until you've figured out which meats you can use.
If she continues to have problems after trying a couple of different meats, then she should look for other possible causes- supplements, grooming products, environmental allergens, etc.
Not sure what position friend is in financially but I would HIGHLY recommend finding a holistic veterinarian preferably one who is also has specialized in nutrition, member of American Academy of Veterinary Nutrition, etc.
Although some dogs do have actual problems with the protein source/ meat it is FAR more likely that her allergies, yeast, etc. (all the things that can lead to icky ears) are being caused by the grains in their normal dog food. Dogs do NOT need grain in their diets.
If it were me, I would immediately put the dog on a completely grain-free diet. I would go raw- aside from it being healthier I find it MUCH easier, but there are grain-free cooked recipes out there. When cutting out grains, this also means don't feed any dog treats that have grains in them.
She should start with a single protein source (chicken or pork or duck or lamb, etc but only one of them) for the first two weeks or so and see if things improve. If they do not, then try two more weeks with a different meat, but again only that one. Remain grain-free. When things get better then you know you have found a "safe" meat.
Then start introducing other meats one at a time and look for recurrence of problems. Remain grain-free. If there are problems then you know the newly introduced protein source is to blame so put it on the no-no list. Continue this until you've figured out which meats you can use.
If she continues to have problems after trying a couple of different meats, then she should look for other possible causes- supplements, grooming products, environmental allergens, etc.
Not sure what position friend is in financially but I would HIGHLY recommend finding a holistic veterinarian preferably one who is also has specialized in nutrition, member of American Academy of Veterinary Nutrition, etc.