There is just no valid medical science behind this line of thought.
My Dearest Gemini I do beg to differ on this point.
Soy Protein in Chicken Eggs
The above is a link to a study on the Soy Protein being found in the egg yolks of chickens fed a soy based diet. If the Soy Protein can get there then it isn't that big of a stretch to think that the Gluten Protein could get there and I can tell you from personal experience with my own chickens that there is something to this. I feed them a grain/soy free diet and can eat as many of their eggs as I want without getting brain fogged or a stomach ache. I have a limit of 3 store bought (organic free range/cage free) eggs every few days otherwise.
So if chickens are what they eat, and humans are what we eat, then why is it such a stretch to think that plants are what they eat? And if what they are eating is the gluten protein then...
I also had a first hand experience with something similar in my tomato garden this year. I spread jalapeno juice at the base of the plants to keep the bunnies away. It worked wonderfully but to my surprise my cherry tomatoes had a spicey taste to them, at least the first few handfuls that I harvested. It was interesting and quite tasty.
Let's make sure that we are keeping all of this science and logic based and not just in the realm of wishful thinking. Doing so does a disservice to the people of this forum and is a good way to keep people unnecessarily sick.
Of course it is possible that the internet and my tastebuds are "all in my head."