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Dogs | Behavior and welfare

Before a dog bites, it has said so many times over. The stress signals run from lip licking, blinking, head turning and yawning, through walking away and freezing, and only then to growling and showing teeth; most bite incidents happen because the earlier signals were ignored or punished out of the dog, and punishing a growl amounts to dismantling the alarm. This chapter also sets out what the five welfare needs mean concretely for dogs, the breed differences in normal behaviors such as sleep and sniffing, the direction of management for separation-related problems and noise fear, why positive reinforcement is preferable to aversive methods, and the safety boundaries between children and dogs that are most often underestimated.

Dogs | Behavior and welfare

Compiled from the dog chapter of the veterinary animal encyclopedia. The same sign is managed differently in different species, and copying what is done for another species can do harm — confirm which animal you are dealing with first.
Basis in the source material: line 197 `• behavioral medicine: fear, aggression, anxiety, environment and learning mechanisms.` (8 keywords, 0 items of content); "animal welfare" appears at lines 267, 315, 350 and 364, in each case at the level of "competencies a veterinarian should have".

5.1 The Five Welfare Needs and the Five Domains

NeedWhat it means concretely for dogsCommon signs when it is unmet
Adequate nutritionBalanced food, clean water reachable at any time, appropriate body conditionOverweight/underweight, food stealing, raiding the bin, pica
Adequate environmentShelter, temperature, non-slip footing, a quiet place to retreat to, safety (no escape, no falls)Hiding, destruction, escape, prolonged panting (heat stress)
HealthPain recognized and treated, preventive medicine in place, veterinary care accessible"Suddenly aggressive", "lazier", "will not go upstairs" are often pain
Expressing normal behaviorSniffing and exploring, chewing, social contact (including with other dogs), exercise, choiceExcessive barking, compulsive behavior (tail chasing, limb licking, light chasing), destruction
Mental state/freedom from fear and distressA predictable life, positive training, not being subjected to aversive methodsLearned helplessness, freezing, aggression, separation-related problems
⚠️ "Five Freedoms" and "Five Domains" are two different frameworks, and this table is an integrated presentation; check the original literature before citing them formally. ✅ Exists · verified: the Five Freedoms were put forward by the UK Farm Animal Welfare Council (FAWC, established 1979), a body that has ceased operating with its functions transferred to the UK government's animal welfare advisory arrangements. Recorded as 【needs a whitelisted source to confirm: a gov.uk official announcement is suggested】. The fact that the Five Freedoms came from FAWC is unaffected (the framework appears widely in peer-reviewed literature), but the years in the institutional history must be checked against the original gov.uk announcement before citation; the Five Domains Model was proposed by Mellor DJ and colleagues and has several verifiable peer-reviewed publications, such as Mellor DJ (2017) "Operational Details of the Five Domains Model and Its Key Applications to the Assessment and Management of Animal Welfare." *Animals*, 7(8):60, DOI: 10.3390/ani7080060, ISSN 2076-2615; Mellor DJ et al. (2020) "The 2020 Five Domains Model: Including Human–Animal Interactions in Assessments of Animal Welfare." *Animals*, 10(10):1870, DOI: 10.3390/ani10101870 (verified through the Crossref API, 2026-07-30). The source material provides no content on any welfare framework.

5.2 Normal behavior and breed differences

BehaviorWhat normal looks likeBreed/group differences
SleepLong total daily sleep, in segments (longer in puppies and older dogs)Snoring in sleep, sleeping with the mouth open, needing to sleep sitting up → a sign of disease in brachycephalics, not charm
Sniffing and exploringStopping to sniff on a walk is the main form of mental enrichmentHounds and scent-working dogs have the highest need; "pulling the dog along to get it over with" = deprivation
ChewingThe dog needs a legitimate outlet for chewingHigh need during teething in puppies and in terrier types
Digging/chasing/herding/retrievingBreed nature, not a bad habitHerding dogs chasing cars and children, hounds chasing cats, gundogs carrying objects → redirect through substitute activities
Social behaviorFriendliness toward people and (in part) toward other dogs has to be built through socializationThe sensitive period for socialization is early puppyhood (3–8 weeks of age focused on other dogs, 5–12 weeks shifting to socialization with people, with receptiveness to new things continuing to about 16–20 weeks of age; Merck Vet Manual: "Dogs are most receptive to learning how to deal with new situations until about 16 to 20 weeks of age" "Dogs that are kept exclusively kenneled or not exposed to people by 14 weeks of age may have severely undeveloped social skills" merckvetmanual.com/dog-owners/behavior-of-dogs/normal-social-behavior-in-dogs,, and the cost of remediation after the window is missed is high
PlayWith pauses, role swapping, and turn taking on both sidesOne side being pinned continuously, freezing, or trying to escape → this is not play and should be stopped

5.3 The ladder of stress signals (before a dog bites, it has said so many times over)

From weak to strong. Most bite incidents happen because the first 8 signals were ignored or punished out of the dog.
StageSignalWhat the owner should do
1 EarlyLip licking, blinking, head turning, turning the body away, yawning (not from sleepiness), scratching (not from an itch)Reduce the source of pressure at once (step back, let go, move the child away)
2 AvoidanceWalking away, hiding, lying down and staying still, ears back, low tail, whale eye (the white of the eye showing)Give the dog a way out; do not follow to reassure it
3 FreezingThe whole body tense, chewing or eating stops, hard staring, breathing becomes shallowThis is the last peaceful warning — stop immediately
4 VocalizingGrowling, showing teethDo not punish a growl under any circumstances (punishing the growl = dismantling the alarm, and next time the dog bites without warning)
5 AggressionAir snap, biting, biting and shakingSeparate safely, then seek medical care (for both the person and the dog) and refer to behavioral medicine

A sudden change in behavior = treat it as a medical problem first: sudden aggression, suddenly refusing stairs or the sofa, suddenly biting at one part of the body, suddenly toileting indoors, sudden night-time restlessness → first rule out pain (especially OA, teeth, ears, IVDD), endocrine disease, neurological disease and cognitive dysfunction, and only then discuss training.

5.4 Common behavior problems and the direction of management

ProblemCommon triggersDirection of management (no drug names or doses)
Separation-related problemsNever having learned to be alone, changes in the household, pain and agingGraduated alone-time training, enrichment before leaving, video recording to establish what actually happens; in severe cases the veterinarian assesses whether prescription medication is needed as support (medication must be prescribed by a veterinarian and works only alongside behavioral treatment)
Noise fear (fireworks, thunder)Lack of desensitization during the sensitive period, a single traumatic eventA safe room prepared in advance + desensitization (not on the day itself), and a veterinary discussion of preventive measures; do not drag the dog out to "face its fear"
Resource guarding (food, toys, places, people)Insufficient resources, having had things taken away, having been punishedIncrease resources, play trade games, do not grab with your hands; do not suppress it through punishment
Aggression (toward people/toward dogs)Fear, pain, resources, territory, insufficient socialization, having learned that "aggression works"Medical investigation first → safety management (separation, muzzle desensitization training) → referral to a behavioral medicine specialist (line 197 "behavioral medicine" and line 263 "knowing when to refer" in the source material)
Compulsive behavior (tail chasing, limb licking, chasing lights and shadows)Stress, a barren environment, pain, neurological problemsMedical investigation (for limb licking, look at the skin and at joint pain first) + enrichment + specialist referral
Inappropriate toileting indoorsIncomplete house training, urinary tract disease, cognitive dysfunction, anxietyTest the urine first; then discuss training
Cognitive dysfunction (CCD)AgingSee §11
Pulling and lungingLack of training, excitement, fearPositive training + suitable equipment (a harness is better than a collar, and is required in brachycephalics and dogs with tracheal collapse)

5.5 The position taken on training methods

RecommendationReason
Use training based mainly on positive reinforcementEffective and it does not create fear
Avoid aversive methods: shock collars, prong collars, choke collars, alpha roll/pinning, shouting, spraying water or airRelevant studies indicate that aversive methods are associated with increased fear, anxiety and risk of aggression (the specific studies and effect sizes 【verification result: no single authoritative effect size — PMC studies on training methods (such as PMC7743949 "Does training method matter?") confirm the research direction linking aversive training with negative welfare indicators, but no attributable whitelisted source gives a single cross-study effect size, 2026-07-30】); and they suppress warning signals (see stage 4 in §5.3)
Checkpoints for choosing a trainerCan explain the principles used, lets you observe the whole session, does not use pain or fear, and is willing to refer aggression cases to a veterinary behavior specialist

5.6 Safety between children and dogs (the section most often underestimated)

FactCorresponding action
Bite incidents occur mostly at home, with a familiar dog, to a child's face and handsYoung children (especially preschoolers) and dogs are not left together unsupervised (the age boundary recommended in different countries 【verification result: no fixed figure should be given for this item — national child-safety guidance differs on the age boundary for being "together unsupervised", and this is safety education rather than a single medical figure, so the principle is that a child of any age with a dog needs an adult present to supervise, with no specific cut-off age, 2026-07-30】)
Children often do what dogs dislike most: hugging, kissing the face, lying on the dog, pulling the tail, approaching while it eats or sleepsTeach the "three do-nots": do not hug, do not disturb eating or sleeping, do not chase. Establish a "do not disturb" zone for the dog
A dog in pain has the highest risk of bitingWith children in the household, treating pain (teeth, ears, joints) actively matters even more

Limits of this content

This content comes from the dog chapter of the veterinary encyclopedia (the original location and the content hash are recorded in the evidence chain). The sources listed at the end are the authoritative materials cited by that chapter; the correspondence is chapter-level, which does not mean that every sentence is traced sentence by sentence to a given source. This material is for education and cannot replace diagnosis and prescription by a licensed veterinarian; in an emergency seek care immediately. It has not been clinically reviewed by a named veterinarian.

FAQ

My dog growled at me — can I scold or punish it?
Do not punish a growl under any circumstances. The growl is the warning stage on the ladder of stress signals, and punishing it amounts to dismantling the alarm, so the next time the dog may bite without warning. Earlier signals include lip licking, blinking, head turning, turning the body away, yawning and scratching, followed by walking away, hiding, ears back and the white of the eye showing; if the dog is already tense all over, has stopped chewing, is staring at you and breathing shallowly, that is the last peaceful warning and you should stop immediately.
犬が私にうなりました。叱ったり罰したりしてよいですか。うなり声を決して罰しないでください。うなり声はストレスのサインの段階における警告の段階であり、これを罰することは警報器を外すことに等しく、次は前触れなく咬むことがあります。より早い段階のサインには、鼻をなめる、まばたき、顔をそむける、体をそむける、あくび、体をかくがあり、続いてその場を離れる、隠れる、耳を後ろに倒す、白目が見えるといった段階が来ます。すでに全身が緊張し、咬むことをやめ、じっと見つめ、呼吸が浅くなっているなら、それが最後の平和的な警告ですので、ただちにやめてください。
My dog growled at me — can I scold or punish it?Do not punish a growl under any circumstances. The growl is the warning stage on the ladder of stress signals, and punishing it amounts to dismantling the alarm, so the next time the dog may bite without warning. Earlier signals include lip licking, blinking, head turning, turning the body away, yawning and scratching, followed by walking away, hiding, ears back and the white of the eye showing; if the dog is already tense all over, has stopped chewing, is staring at you and breathing shallowly, that is the last peaceful warning and you should stop immediately.
My dog has suddenly become aggressive and refuses to go upstairs — has it turned bad?
A sudden change in behavior should be treated as a medical problem first. Sudden aggression, suddenly refusing stairs or the sofa, suddenly biting at one part of the body, suddenly toileting indoors and sudden night-time restlessness should all lead first to ruling out pain (especially osteoarthritis, teeth, ears, intervertebral disc disease), endocrine disease, neurological disease and cognitive dysfunction, and only then to a discussion of training. Inappropriate toileting indoors is the same: test the urine first.
犬が急に怒りっぽくなり、階段を上りたがりません。性格が悪くなったのですか。行動の急変はまず医学的な問題として扱ってください。急に攻撃する、急に階段やソファを嫌がる、急に体の一部を咬む、急に室内で排泄する、急に夜落ち着かないといった変化は、いずれもまず痛み(特に変形性関節症、歯、耳、椎間板疾患)、内分泌、神経、認知機能不全を除外し、そのうえで訓練の話をすべきものです。室内での不適切な排泄も同じで、まず尿を検査します。
My dog has suddenly become aggressive and refuses to go upstairs — has it turned bad?A sudden change in behavior should be treated as a medical problem first. Sudden aggression, suddenly refusing stairs or the sofa, suddenly biting at one part of the body, suddenly toileting indoors and sudden night-time restlessness should all lead first to ruling out pain (especially osteoarthritis, teeth, ears, intervertebral disc disease), endocrine disease, neurological disease and cognitive dysfunction, and only then to a discussion of training. Inappropriate toileting indoors is the same: test the urine first.
What should I watch for between my child and my dog?
Bite incidents occur mostly at home, are caused by a familiar dog, and injure the child's face and hands, so the principle is that a child of any age with a dog needs an adult present to supervise. Teach the child the "three do-nots": do not hug, do not disturb the dog while it eats or sleeps, do not chase it, and establish a do-not-disturb zone for the dog. A dog in pain has the highest risk of biting, so with children at home it matters even more to treat dental, ear and joint pain actively.
子どもと犬が一緒に過ごすとき、何に注意すべきですか。咬傷事故の多くは家庭内で、よく知っている犬により、子どもの顔と手に起こります。そのため、どの年齢の子どもでも犬と接する際は大人が同席して監督することが原則です。子どもには「三つのしない」を教えます:抱きしめない、食事と睡眠を邪魔しない、追いかけない。そして犬のための邪魔をしない区域を設けます。犬は痛みがあるときに咬むリスクが最も高くなるため、家に子どもがいる場合は歯、耳、関節の痛みの治療をいっそう積極的に行ってください。
What should I watch for between my child and my dog?Bite incidents occur mostly at home, are caused by a familiar dog, and injure the child's face and hands, so the principle is that a child of any age with a dog needs an adult present to supervise. Teach the child the "three do-nots": do not hug, do not disturb the dog while it eats or sleeps, do not chase it, and establish a do-not-disturb zone for the dog. A dog in pain has the highest risk of biting, so with children at home it matters even more to treat dental, ear and joint pain actively.

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獸醫百科編輯部・《Dogs | Behavior and welfare》・IDAEO 知識庫・2026-08-13・https://km.idaeo.ai/post/vet/dog-behaviour-welfare

Updated 2026-08-14

更新 2026-08-14T04:47:48.635Z · server-rendered · four-language · IDAEO 知識庫