It’s generally stated that a short elimination diet will not cause any long term problems if the dog was well nourished before beginning the elimination diet. Salmon is high in omega 3 and deficient in omega 6 and other fatty acids but again I wouldn’t get too concerned over a two week period.
For what it’s worth, some feel that environmental allergies don’t occur unless their is first digestive issues that ignite the immune system to the point of reacting to things it shouldn’t react to — like pollen. Why would a healthy immune system / body all the sudden react to things in the environment it shouldn’t.
Additionally it is believed that having the wrong bacteria, or inappropriate bacteria, in the gut can aggravate and even cause allergies. There’s a blurb about it on Penn State website “Inner Weapons Against Allergies: Gut Bacteria Control Allergic Diseases, Perelman School of Medicine Study Finds” http://www.uphs.upenn.edu/news/News_Releases/2012/03/allergies/ If you can get control of the environmental trigger the yeast overgrowth may work itself out naturally.
