Amber,
First realize that a serious cough is probably not caused by a food allergy. I am not a vet so you consulting with the vet is the best thing on this subject.

Actually food allergies are very common in dogs, but usually not recognized as a food allergy. They usually display symptoms such as hot spots, excessive shedding, flakey and itchy skin and dull coat. There are some who think that certain foods found in the poorer nutritional value of food are the reason we are seeing so many more instances of cancer at younger ages in our furry friends. Personally, I think the preservatives that are put in foods to perserve them are what is harmful. Before anyone jumps on me for this statement, please realize I believe the jury is still out on this though.

My friend's dog was never diagnosed medically as having an allergy to turkey. It is our guess because when they switched him from Nutro to Innova, within weeks, he broke out with several hot spots. Turkey was the only protien source that was changed. They have him on California Natural and he has the most beautiful coat you can imagine and has never had another hot spot.

When I recommend people switch to super premium foods, it because of the outward signs of food allergies that are displayed. In your case it is an inward sign and I have never heard of a dog coughing as a symptom of a food allergy.

I know you already feed your pups Innova. You may want to switch to California Natural Lamb formula. The ingredients list is very short and sweet and very healthy.

I still strongly encourage you to follow through with your vet on this. Aunt Jazz had the vets stumped too and it turned out to be cancer and she was only 7 1/2 years old. My friends ended up taking her to Ohio State University School of Veterinary medicine (kind of like the Tuft's in our region) when the diagnosis could not be determined by the regular vet. They diagnosed her in less than 3 hours with cancer and within 3 days she had to be put down. I'm not saying your dog has cancer. I'm saying specialists usually can diagnose things much faster when it comes to something challenging and out of the ordinary.

I hope I answered your question. Please let us know how things are going and I will be praying for kobie and you. It is a very trying thing to not know what ails our babies.