Dog Training: An Evidence-Based Starter Guide (+ How to Pick a Trainer) | Ireland Guide

This guide covers all three, plus a two-week starter plan you can begin tonight.

What the research says about training methods

Dog training is full of confident opinions. The published evidence is narrower and more consistent than the internet suggests.

Gal Ziv's 2017 review in the Journal of Veterinary Behaviour examined 17 studies comparing training approaches and concluded that aversive methods (positive punishment, escape/avoidance) can compromise dogs' physical and mental health, with no evidence that they are more effective than reward-based methods — and at least three studies suggesting the opposite.

In 2020, Vieira de Castro and colleagues published a controlled study in PLOS ONE following 92 companion dogs from reward-based, mixed, and aversive-based training schools. Dogs from aversive-based schools showed more stress-related behaviours during training, higher post-training cortisol increases, and more "pessimistic" responses in a cognitive bias test — an effect that appeared outside the training context, not just during it.

The same year, China, Mills and Cooper tested the practical question directly in Frontiers in Veterinary Science: 63 dogs with known off-lead problems (recall failure, chasing) trained across three groups, up to 150 minutes over five days. Reward-based training produced better outcomes than e-collar training, and the authors concluded there is no evidence e-collar training is necessary even for its most commonly cited use case.

AVSAB's 2021 Position Statement on Humane Dog Training draws the obvious line: reward-based methods only, including for behaviour problems, and no evidence that aversive training is necessary.

What is still uncertain: much of this literature relies on surveys and relatively small samples, and long-term follow-up is limited. What is not in dispute is the direction — nothing in the current evidence base gives aversive tools an advantage worth their welfare cost.

Training issue, management issue, or vet issue?

Owners waste months training a problem that was never a training problem. Run your issue through this before you buy a course.

Step 1 — Is it new, sudden, or out of character?

A house-trained adult dog urinating indoors, a friendly dog snapping when touched, a dog that suddenly won't jump on the sofa, new night restlessness, or a change in appetite alongside the behaviour change: this is a veterinary question first. Mills et al. (2020, Animals) reviewed behaviour caseloads and estimated that a conservative one-third of referred cases involve some painful condition, with figures approaching 80% in some samples. Book the exam before the trainer.

Step 2 — Does it involve fear, aggression, or panic?

Growling, biting, snapping, resource guarding, panic when left alone, or extreme reactivity on leash: this is a qualified-professional matter, ideally a veterinary behaviorist (DACVB), a Certified Applied Animal Behaviorist (CAAB), or a CBCC-KA behaviour consultant working with your vet. Do not follow generic YouTube protocols for aggression. Suppressing a growl removes your warning system; it does not remove the emotion underneath.

Step 3 — Is the dog simply able to practice the behaviour?

Counter-surfing, trash raiding, chewing shoes, bolting out the front door, puppy accidents: this is a management issue. Baby gates, a crate, closed doors, food off counters, and a leash indoors solve these faster than any command. Management is not cheating — it prevents the dog from rehearsing a behaviour that gets reinforced every single time it works.

Step 4 — Is the dog calm, healthy, and just doesn't know what you want?

Sit, down, recall, loose-leash walking, settling on a mat, polite greetings: this is a training issue, and it is the one you can absolutely handle yourself with the plan below or a good group class.

Most real-world problems are a mix — usually management plus training. Aggression and separation anxiety are the two categories that most often get mislabeled as training issues, and they are the two where going it alone tends to make things worse.

The trainer-credential problem, explained honestly

Independent, third-party credentials are the closest thing to a filter. Here is what the real ones actually require.

Only DACVBs are veterinarians. Only DACVBs — and veterinarians generally — can prescribe. The word "behaviorist" is otherwise unprotected, so verify the letters, not the label.

Five questions to ask before you hire anyone

• "What happens when my dog gets it right, and what happens when he gets it wrong?" A vague answer, or one involving leash corrections, prongs, or e-collars, is your answer.
• "Which certification do you hold, and who issued it?" Then check that body's directory yourself.
• "Can I watch a class before enrolling?" A no is a red flag. So is a board-and-train program you cannot observe.
• "When would you refer me to a veterinarian?" Good trainers refer. Trainers who claim to fix everything, fix nothing.
• Do they guarantee results? Behaviour guarantees are a marketing claim, not a professional one.

Your first two weeks: a realistic plan

Three to five sessions a day, two to five minutes each. Short and frequent beats one long, frustrating session. Use pea-sized soft treats your dog actually cares about, and subtract them from the daily food ration.

Days 1–3: the marker and the name

Charge the marker. Say a crisp word — "yes" — or click a clicker, then immediately deliver a treat. Repeat 15 times, twice a day. You are not asking for anything yet. You are teaching your dog that this specific sound predicts food, which turns it into a precise timing tool.

Name response. When your dog isn't looking at you, say his name once. The instant his head turns, mark and pay. Never repeat the name three times; never use it for anything unpleasant. Ten reps a day, starting in a quiet room.

Crate and house-training start immediately. Feed every meal in the crate, door open at first. Take a puppy out on waking, after eating, after play, and every 60–90 minutes otherwise. Go to the same spot, wait quietly, mark the moment elimination finishes, then treat outdoors. Indoor accidents get cleaned with an enzymatic cleaner and no reaction — punishment after the fact teaches dogs to hide from you, not to hold it.

Days 4–7: sit, and the beginning of recall

Sit. Hold a treat at your dog's nose, move it slowly back over his head. His rear drops. Mark the instant it touches the floor, pay. After roughly ten successes, fade the food out of your hand and use the same empty-hand motion. Only add the word "sit" once the behaviour is reliable — say it just before you cue the motion.

Recall foundations. Indoors, two people, ten feet apart. One says the dog's name and "come" in a bright tone; the dog runs over; mark, pay generously, then release. Three to five reps, then stop while he still wants more. Never call your dog to do something he dislikes — go get him instead.

Days 8–14: adding difficulty, one variable at a time

Now change one thing per session — distance, duration, or distraction — never two. Practice sit in the kitchen, then the hallway, then the yard. Extend crate time to 10, then 20 minutes with a stuffed chew, always leaving before he starts to protest. Take recall into the yard on a long line. Expect a visible dip in reliability every time the setting changes; that is normal, not backsliding.

Realistic expectations: two weeks of consistent short sessions typically produces a reliable indoor sit, a good name response, an enthusiastic recall in low-distraction settings, and a puppy going meaningfully longer between accidents. Solid outdoor recall around real distractions takes months, and most dogs are not fully house-trained until four to six months of age. Puppies also relapse around adolescence — that is developmental, not failure.

Puppies: the socialization window matters more than the sit

AVSAB's position statement on puppy socialization is unusually direct: the primary and most important window is the first three months of life, and puppies should receive socialization before they are fully vaccinated, because behavioural problems — not infectious disease — are the leading cause of death in dogs under three years old. AVSAB notes puppies can start class as early as 7–8 weeks with at least one set of vaccines given a minimum of seven days beforehand. Talk to your vet about balancing exposure and risk in your area; carrying a young puppy through a hardware store is safer than a dog park.

Five mistakes that undo good training

• Repeating a cue. "Sit, sit, SIT" teaches that the word means nothing until the third time.
• Training only when it goes wrong. Most learning should happen when nothing is happening.
• Rewarding too slowly. Beyond about a second, the dog links the treat to whatever he did next.
• Skipping management. Every successful counter-surf is a paid rehearsal.
• Assuming stubbornness. A dog that "knows it but won't do it" is usually over threshold, in pain, or has never practiced in that context.

Frequently asked questions

How long does it take to train a dog?

Basic cues in a quiet room take days. Reliability around real distractions takes months, and maintenance is lifelong. Most puppies are dependably house-trained between four and six months. Anyone promising a finished dog in two weeks is selling suppression, not learning.

Is positive reinforcement enough for a stubborn or strong dog?

The controlled evidence says yes. China, Mills and Cooper (2020) tested dogs with known off-lead problems — the exact population e-collars are marketed for — and reward-based training outperformed e-collar training. AVSAB recommends reward-based methods for all dogs, including for behaviour problems.

Are e-collars, prong collars, or alpha rolls ever appropriate?

Current evidence and AVSAB's 2021 position statement do not support them. Aversive methods are associated with stress responses, elevated cortisol, and in survey studies with aggression and anxiety-related behaviour, with no demonstrated effectiveness advantage. There is also no scientific support for the "dominance" framing these tools are usually sold with.

Group class, private lessons, or board-and-train?

Group classes are excellent for puppies and everyday manners — the controlled distraction is a feature. Private lessons suit specific problems and dogs who struggle around other dogs. Board-and-train is the riskiest option: you cannot see the methods used, you are not learning the skills yourself, and the behaviour often doesn't transfer home. If you consider one, insist on observing the facility during training.

My dog's behaviour changed suddenly. Is that a training problem?

Assume not, until a vet says otherwise. Sudden aggression, house-soiling in a trained adult, new noise sensitivity, or reluctance to move or be touched all warrant a veterinary exam that includes an orthopaedic and pain assessment. Mills et al. (2020) found painful conditions in a substantial share of referred behaviour cases.

Sources

• Ziv, G. (2017). The effects of using aversive training methods in dogs — A review. Journal of Veterinary Behaviour 19:50–60.
• Vieira de Castro, A.C., et al. (2020). Does training method matter? PLOS ONE 15(12): e0225023 — PLOS ONE
• China, L., Mills, D.S., Cooper, J.J. (2020). Frontiers in Veterinary Science 7:508 — Frontiers
• Mills, D.S., et al. (2020). Pain and Problem Behaviour in Cats and Dogs. Animals 10(2):318 — PMC
• AVSAB (2021). Position Statement on Humane Dog Training — avsab.org
• AVSAB. Position Statement on Puppy Socialization — avsab.org
• CCPDT certification requirements — ccpdt.org
• Animal Behaviour Society, CAAB/ACAAB requirements — animalbehaviorsociety.org
• ACVB Certification — dacvb.org

A note on scope

This article is general educational information, not veterinary or behavioural advice for your individual dog. Aggression, self-injury, panic, and any sudden change in behaviour should be assessed by your veterinarian, who can rule out pain and medical causes and refer you to a board-certified veterinary behaviorist (DACVB) or a qualified certified behaviour consultant. No supplement, food, or product treats, prevents, or resolves a behaviour problem, and none should be used in place of veterinary assessment or training.