No, Irish Wolfhounds are not aggressive dogs. They tend to be affectionate, calm, and even-tempered, making them excellent companions for families and individuals. However, like any breed, individual temperament can vary, so proper socialization and training are important to ensure they grow up to be well-behaved.
If you are concerned by any signs of aggression or reactivity in your dog, be sure to address it promptly with the help of a professional trainer or behaviorist. Pain, discomfort, or underlying medical conditions can sometimes contribute to changes in a dog’s behavior, so it may also be worth visiting a vet to rule out their health as a cause for their behavior.