Are Bullmastiffs easy to train?

No, Bullmastiffs are not easy to train in general. They are intelligent and quick learners, but they can also be strong-willed and independent, and their protective instinct can sometimes manifest as assertiveness if not properly managed. Bullmastiffs need a confident and “in-charge” trainer who can teach them their proper place in the family structure. 

However, it's worth noting that training any dog takes substantial time and effort, regardless of breed. With patience, dedication, and positive reinforcement, Bullmastiffs can learn to be well-behaved and obedient companions. Enrolling them in obedience classes or working with a professional dog trainer can also be beneficial, especially for first-time pet parents or those facing training challenges.