Bella, a Cavoodle puppy from Maroubra, was mouthing hands well past sixteen weeks, jumping on every visitor, and refusing her dinner most nights until her owners switched foods to coax her into eating. None of it was unusual. All of it was fixable, and none of it needed a single piece of new equipment, just five changes to how the household responded. Within a month, Bella was a different puppy to live with.

Luke Buchanan, Owner of The Toe Beans Co and Sydney's Puppy Trainer, sees the same handful of mistakes on repeat with new puppy owners. None of them come from a lack of love. Most come from good intentions applied at the wrong moment.

1. Skipping the leadership foundation and going straight to commands

Sit, stay, and recall are the visible, satisfying part of training, so that's where most owners start and stop. The problem is a puppy that's learned commands without a leadership foundation underneath complies until it doesn't need to. It works the trick for a treat, then ignores the same cue the moment there's no treat or no pressure.

Build trust through consistency first, not affection, then respect through calm and predictable leadership over weeks, not one dramatic correction. Only then does affection become the reward rather than the whole relationship. Skipping straight to love and cuddles without the first two steps in place leaves a puppy with an affectionate owner and no boundaries, which reads to the puppy as nobody actually steering.

2. Inconsistent rules between household members

One person allows the couch, another tells the puppy off for it. One person ignores the puppy on arrival, another makes a fuss. Every person means well, and the puppy still can't work out which answer is real, because the answer depends on who's in the room.

Every rule needs one version, applied by everyone, every time. The couch is only ever offered when invited, removed calmly without drama if the puppy jumps up uninvited. Visitors are briefed to ignore the puppy completely on arrival. Whoever's present redirects attention-seeking, nudging, leaning, forcing through doorways first, the same way, every time it happens.

3. Over-comforting fear and anxiety

A bin lorry rumbles past and the puppy startles. The instinctive response is to scoop it up, use a soothing voice, pat it reassuringly. It feels like the kind thing to do. It's also the thing that confirms to the puppy that the trigger really was worth reacting to.

Stay neutral instead. Keep the puppy on lead, walk past calmly. If you do stop nearby, turn your back to the trigger rather than facing it, since that signals no danger far more clearly than words. No touching, no talking, no eye contact in that moment, save the affection for once the trigger is gone and the puppy is genuinely calm. The same principle governs arrivals: an excited greeting confirms the puppy's belief it was holding the fort while you were out, which is the seed of separation anxiety later. Ignore the puppy completely on arrival, wait until it's settled, then wait five more minutes before any affection.

4. Rushing or mishandling socialisation

Vaccination caution and a busy first few weeks mean the critical socialisation window, roughly up to five months, gets missed by accident more often than by choice. Or it happens badly: an over-excited adult dog crashing into a puppy at the park, or calling a puppy over specifically to end its play, both of which do active damage rather than good.

Deliberate exposure before five months matters: other vaccinated dogs you actually know, matched by size rather than age, people of every age, traffic, loud noises, different surfaces underfoot, and positive early vet and groomer visits before there's a real need to go. Never call a puppy over just to interrupt play, and treat any unsettling encounter with the same neutral, unbothered energy described above.

5. Letting small habits slide because the puppy is cute

Mouthing, jumping, and food pushiness are all genuinely normal at ten weeks. The problem is owners stop tracking the age, so what was fine at ten weeks is still being allowed at twenty. Mouthing calls for a straightforward escalation: redirect only at eight to ten weeks, a calm "ow" and gentle push-off from twelve to fifteen weeks, and an immediate timeout for teeth on skin from sixteen weeks on. Past that point it's a behavioural issue, not a developmental stage.

A puppy that pushes its bowl around or skips meals is very often making a control move rather than genuinely refusing food. Switching foods to chase its mood teaches the puppy it controls what goes in the bowl. Ask for a sit and a release before the bowl goes down, pick it straight back up if the puppy walks away with food still in it, and stick with one food regardless of a temporary refusal.

6. Over-exercising, or no daily structure at all

Tiring a puppy out feels responsible, but there's a hard ceiling most owners don't know about: roughly five minutes of on-lead exercise per month of age, twice a day, rough play included. Puppies won't self-regulate by stopping. A puppy sitting or lying down mid-walk is already past enough, not being lazy. Over-exercise causes joint damage that frequently doesn't show up for years, particularly in larger breeds.

The opposite problem, no consistent rhythm to the day, slows down potty training and every other piece of training alongside it. Build the day around potty first thing on waking, age-matched exercise, fixed mealtimes, and plenty of sleep, an eight-week-old puppy may need sixteen to eighteen hours a day. Predictability is what makes everything else stick.

The real cost of getting this wrong

Most people budget for food and the odd vet check. Few budget for what an untreated behavioural pattern actually costs down the line: a full behavioural consult, a longer course of in-home training to unwind a habit that's had months to set in, or in the worst cases, a torn-up backyard or a rehoming decision nobody wanted to make. Prevention here, a few weeks of consistent effort early, is dramatically cheaper than the fix.

Want help putting this into practice?

The Toe Beans Co runs a free SKOOL community where Sydney dog owners get training guides, Q&As, and direct support from Luke. It's free to join.

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Frequently asked questions

Q: My puppy is past sixteen weeks and still mouthing hard. Is it too late?

No, but the approach changes. Past sixteen weeks, treat it as a behavioural issue rather than a developmental stage: an immediate, calm timeout for teeth on skin, applied consistently by everyone in the household.

Q: How much exercise is actually safe for a growing puppy?

A commonly used guide is five minutes of on-lead exercise per month of age, twice daily, rough play included. Watch the puppy's body rather than the clock. Sitting or lying down mid-walk means stop, regardless of what the guide suggests.

Q: Is it ever too late to fix inconsistent household rules?

No. Puppies and adult dogs both adapt quickly once every person in the household applies the same rule the same way. The improvement typically shows within one to two weeks of genuine, whole-household consistency.