24 Aug 2017 --- Humans are not the only ones to suffer from food intolerance and allergy symptoms like swelling in the face or an asthma attack. Other animals, such as cats, dogs and horses, are affected after feeding as well, according to a new study by the Messerli Research Institute, a cooperation between the University of Veterinary Medicine Vienna and the Medical University of Vienna. In fact, the number of pets affected by food allergies and intolerances has even converged with that of humans.