United Airlines just released a list of dog breeds that it will no longer allow on their airplanes. The restrictions are for the listed breeds who are 6 months old or older. Is this dog race profiling? The list: Breeds, or mixes, that have reached either 6 months of age or 20 pounds that are prohibited are: Pit Bull Terriers, American Staffordshire Terriers, Presa Canario, Perro de Presa Cana