I always feed my dog Nature's Recipe Healthy Weight Chicken formula. In the past I've purchased the Lamb & Rice version of this food to mix up the protein and my dogs have had no problems.
I haven't done that in a long time up until a week ago. Three days after switching, I've notice one of my dogs itching a lot more than normal. (He doesn't have fleas/ticks) and I've never known him to have allergies. Can a food allergy suddenly develop, and show symptoms this quickly?
Also, my real concern is beginning late last night and through this morning he has been sneezing a lot. I checked for any obstruction in his nose and I don't see anything, but it is inflamed. I don't know what is causing this. Yesterday afternoon we did visit a pond that we frequent for some swimming and romping, not sure if it could involve something there or is stemming from the food change.
Is there anything I can do for his inflamed nose before taking him to the vet?
Edit: My boyfriend thinks I am over reacting, but I am well aware of what is and isn't normal for our dog(s). Also, the dogs are up to date on vaccines including Bordatella.