Newly Diagnosed & Vegetarian in Coping with Celiac Disease Posted June 13, 2008 · Report to Admin My mom is allergic to chicken. I've heard of people with beef allergies and of course there is the shellfish allergy. That's one of the top 8 allergens! Shellfish yes. A very serious allergy. Can even be deadly. When I said meat, I meant Mammals. Allergic to beef??? I dont believe it. Can you back up this with scientific data? Some people are allergic to everything. They are also called Hypochondriacs in some circles! You will find a lot of them right here on this site.