One of the reasons why some dog lovers cannot take a dog for a pet is allergy. Dogs are commonly blamed for the clogged nose, watery eyes, the sneezing and the general feeling of fatigue. Allergies can get worse and develop into asthma and as it is commonly believed that dog hair triggers an allergic reaction, people would hesitate to get a dog for a pet. Some breeds are hyped to be hypoallergenic but a person that was weakened by allergies would think twice to get a dog.