Maybe, I don't know. That's why I'm asking for opinions and theories. I may never know the answer, but I just would like to know all I can about the situation.
I don't think the medicine itself caused the allergy to corn per say. But I would like to know if anyone else has had a similar experience with their pets after using it.
It could just be a timing issue like you have suggested, I just think that all 3 at the exact same time is not a coincidence. I can't do anything about what has already happened, they and I have come to an accommodation to the condition (barring any more corn chip parties). And eventually I will be faced with the decision of whether or not to use that type of treatment on any future pets.
My dogs are not "dogs", they are family. As I'm sure that goes for almost everybody who use this forum. So, I am looking for the best way to care for them.
I appreciate the suggestion, it does help in the overall understanding of the problem.