Our Resources On Your Mastiff’s First Night Home, Crate Training, Potty Training, and Teaching First Commands
Mastiff Training & Behavior Series
When to Hire a Professional Trainer & Understanding Fear Periods and Adolescent Regression
English Mastiffs go through predictable developmental phases that can temporarily change behavior, including fear periods and adolescent regression. Many of these changes are normal and resolve with consistency and structure. However, professional help should be considered when behaviors are persistent, escalating, or affecting safety.
From Puppy to Adult: Understanding Your English Mastiff’s Transition Phase
The transition from puppy to adult in English Mastiffs is gradual, not sudden. Between roughly 6 months and 24 months, behavior, structure, and emotional responses shift significantly. During this time, your dog may alternate between mature, calm behavior and impulsive, adolescent behavior. This is normal.