Your 1-year-old dog is likely misbehaving due to normal adolescent "teenage" rebellion, testing boundaries, boredom from insufficient mental/physical stimulation, anxiety, or inconsistent training, as their hormones shift and independence grows. This is a common phase, often called "puppy terribles," where they may regress or exhibit new challenges, requiring consistent training, more exercise, mental enrichment, and patience to guide them to adulthood.
If you notice your dog begins demonstrating strange behavior, it is important to rule out health conditions. Dogs are creatures of habit, so they may respond negatively to a new feeding schedule, guests in the home, bringing home a new pet, or other major changes around the house.
Instead of trying to use loud noise, physical punishment, scolding or time-outs to change your dog's behavior, good and effective training utilizes smart management and rewarding good choices. Bad behavior disappears once we show our dog what it is that we want, and how good behavior pays off.
Adolescence marks the change from being a puppy to becoming an adult. In dogs, it can start any time between six and 12 months and can end between 18 and 24 months. During this time, there are dramatic hormonal changes and a reorganisation of the brain.
A red flag dog behavior signals deep fear, stress, or potential aggression, going beyond normal misbehavior, and includes intense growling/snapping without cause, sudden aggression in a calm dog, persistent hiding, resource guarding (food aggression), freezing, destructive behavior linked to separation anxiety, or signs of extreme anxiety like trembling, lip-licking, and tail-tucking, indicating underlying problems needing professional intervention.
The 3-3-3 rule for dogs is a guideline for the adjustment period after adoption, outlining three phases: 3 Days (decompression, feeling overwhelmed/scared), 3 Weeks (starting to settle in, learning routine, personality emerges), and 3 Months (feeling secure, bonded, and truly at home). It helps new owners manage expectations and be patient as their rescue dog transitions, emphasizing calm energy, routine, and space in the early days to build trust.
Look out for problems
If their behaviour changes or they show regular signs of stress or fear (such as excessive panting, licking lips, hiding, cowering or aggression), they could be distressed, bored, ill or injured. If you notice a change, ask your vet for advice. They may then refer you to an animal behaviourist.
The "10 10 10 rule" for dogs refers to two main concepts: a potty training method for puppies (10 mins outside, 10 ft space, 10 mins supervision/reward) and the 80/10/10 guideline for raw feeding (80% muscle meat, 10% bone, 10% organ), both offering structure for training or diet. Another interpretation is the 10% rule for treats, limiting them to 10% of daily calories to maintain a balanced diet, ensuring most nutrition comes from complete dog food.
A Study Found These Are the Best & Worst Behaved Dog Breeds A study looked at dog owners' Instagram posts to figure out the best and worst-behaved dog breeds. Fluffy white Japanese Spitz dogs are the naughtiest. And a half-Chihuahua, half-Pug breed called Chugs also ranked low.
If you suddenly notice your dogs are growling, snapping, or biting, the first step is to have them both examined by your veterinarian. Pain, inflamed skin, loss of mobility, loss of ability to digest food, and loss of vision or hearing are among the many physical changes that can lead to aggressive responses.
Hand clapping and using shaker cans or horns can be intimidating enough to inhibit undesirable behavior. However, remote punishment is preferred. Remote punishment consists of using something that appears unconnected to the punisher to stop the problem behavior.
The "3-second rule" for dogs has two main meanings: for greetings, it's a short, sniff-and-separate technique (sniff for 3 seconds, then walk away) to keep initial meetings positive, preventing over-arousal or conflict, and for training, it's the maximum time (3 seconds) to give a dog to respond to a command before repeating it or redirecting, ensuring they connect the action to the consequence. It's also used with petting to give dogs choice: pet for 3 seconds, pause, and see if they solicit more attention.
The Hardest Dog Breeds to Train: Working with Difficult to Train...
"Silent killer" in dogs usually refers to deadly diseases that progress with few early symptoms, primarily Heartworm, Hemangiosarcoma (a type of cancer), and sometimes Leptospirosis or Canine Parvovirus, all characterized by vague initial signs, rapid progression, and severe organ damage, making prevention and early detection crucial.
Just like us, dogs will reach an adolescent (or teenage) stage in their lives. They are often reported to go through a "rebellious" phase, like some human teens. Our vets have some advice for owners whose pups are reaching adolescence. When dogs reach adolescence, you may notice changes in their behaviour.
The 'Terrible Twos' in Puppy Terms
This phase often begins around the six-month mark and can last until they're about one to two years old. During this time, you may notice: Excessive chewing or biting, sometimes due to teething or boredom.
Dog Breeds Most Likely to Bite
Some breeds are more likely than others to develop ADHD, namely terrier breeds (particularly Cairns and Jack Russells), and German Shepherds.
French bulldog, bulldog or a pug
These are Simpson-Vernon's top pick for dogs he'd never own. “Basically any flat-faced dog,” says Ben the Vet. “Society has normalized the fact that these dogs snorting means that they can't breathe very well.”
The hardest "commandment" (command) to teach a dog is often considered Recall ("Come"), due to powerful natural instincts to explore or play, followed by impulse control commands like "Leave It/Drop It", and complex obedience actions like the "Finish" (positioning at the handler's side) or "Heel", requiring intense focus and self-control, especially with distractions like other dogs or interesting sights/smells.
An hour for a dog feels much longer than an hour for a human because dogs perceive time more slowly due to their faster metabolism and heightened awareness of routines, so a 10-minute wait can feel like 70 minutes to them, and your hour-long absence feels like an eternity, though they don't grasp clock time but rather the intervals between events like meals, walks, and your return.
The 3-3-3 rule for dogs is a guideline for the adjustment period after adoption, representing 3 days (overwhelmed/hiding), 3 weeks (settling in/testing boundaries), and 3 months (feeling at home/bonding) to help owners manage expectations and provide patience, routine, and a calm environment, understanding that anxiety is normal as they decompress from a stressful past. It's a framework for recognizing stress and fostering trust, not a rigid timeline, but it helps owners understand why a new dog might seem timid or act out initially.
Since pets can't tell us when something's wrong, they often express discomfort, pain, or stress through behavior. Sudden shifts in how your pet acts may be more than just a “bad day”—they could signal a medical condition or emotional distress that needs attention.
How to spot the signs of stress
Bad behavior in dogs covers a wide range of issues — ignoring commands, breaking house training, inappropriate shows of dominance and destructiveness, fighting, and biting — should always be taken seriously.