Any one person could go into Petsmart and ask "What's a good food for my animal?"
And 9 times out of 10, that advice will be absolute crap. Just saying as a caveat. *Shrug* Because you asking a person who does not have a medical license or any knowledge - therefore, they have no
accountability in terms of that. Veterinarians
do.
At best, I could give you vague references about how allergies work and how general ingredients in foods exacerbate or reduce allergic reactions, but once you start naming brands (and once you become a legal vet, you'll know), you ARE essentially giving medical advice. And you cannot give personal, case-related medical advice without a valid client-patient relationship - ie not over the internet.
Say you're makin some small talk with a guy in the supermarket line, he mentioned his dog has allergies, Oh no, you may ask a few questions, then it slips in about how great whatever brand is (as a vet) for an allergic dog, this is a great bran maybe worth a try...This person is not your client and you have not personally seen and worked up this dog - perhaps, the person goes out an buys it, dog has an even worse reaction, owner sues you - and you lose, because you made a recommendation without client patient relationship. This may seem like an extreme circumstance, but anyone who has been keeping up with all the legal woes of small animal vets, this happens. It really does.
You can "inform" as a student to your heart's content. But once you are licensed, you need to be very careful about having general education spill over into recommendation - because owners WILL TAKE our info, or positive idea about a product, as recommendations, even if you don't mean it to be a recommendation, because you are the doctor.
Just be aware of that. I'm not saying never tell anyone anything, but be careful.