So, it sounds like you’ve possibly dealt with other intolerance / allergies that your pup might have had previously. Is that the case? At first, I thought this was his first reaction ever, to anything. It seems like a dog that has any intolerance / allergy, is likely to have more.
I’d probably compare the rest of the ingredients just to be sure. I’d hate to see you rule out pork. Maybe keep it in your back pocket (figuratively) to try again another time just to be sure. My thought was that it could been another ingredient or an environmental allergy…, or depending on the type of reaction, it could’ve been a problem with the food (an ingredient, a chemical, preservative or some sort of chemical reaction).
And, I don’t believe you have to have had prior exposure in order to illicit a response. I have a pup whose food intolerances have me confounded. I believe his food intolerance issues started as a result of vaccinosis as a tiny pup. He’s just turned two and there are very few foods I can feed him. I never know what he’ll react to and I always have a food spreadsheet going.
