I have a friend whose Yorkshire terrier is allergic to chicken. It gives him seizures. She had to put him on a special food that doesn't have any kind of chicken products in it. She has to get this food that has what they call "alternate proteins," like duck and lamb. She has to be really careful if she and her husband have chicken for supper because Boo-Boo loves chicken and will get into it if they don't watch him closely.
Not long ago, he got into some chicken and his mom came into the room and saw him seizing. She had to take him to the vet, and he was all right, but it certainly gave her a scare.