Normal Behaviors and Body Language Interpretation


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Normal Behaviors and Body Language Interpretation


Communication in the animal world is diverse, involving vocalizations, scents, pheromones, and, most importantly, body language. Understanding animal body language is essential, particularly for humans, as it is a primary method animals use to express their emotional states. Veterinarians need to be especially attuned to even the most subtle of body language signals in order to provide humane care to their patients, as well as to help clients understand their pets in an effort to support the human–animal bond (Figure 2.1).


Animal behavior is a sequence of events (Frank 2013). Observing this entire sequence helps determine whether an animal’s behavior is normal or indicative of a problem. For instance, in the context of canine aggression, this sequence might start with an initial warning such as growling or lip‐lifting, indicating the initiation phase (Figure 2.2). This is typically followed by a pause, during which the dog has communicated their discomfort and is waiting for a response from the other party. In some cases the sequence may progress to a bite, representing the action phase. If a bite does occur, it often ends with an immediate voluntary release, concluding the sequence (Frank 2013).


However, when there are omissions or alterations in this behavioral sequence, it is often considered “abnormal” or indicative of an illness. For example, a dog that growls and bites simultaneously, without any prior warning, displays an altered sequence. The absence of a clear initiation phase in this instance suggests a deviation from normal behavioral patterns, which could be indicative of an underlying medical condition (Frank 2013). This principle applies not just to dogs but to other animal species as well. This understanding is important for veterinarians and pet caregivers alike in order for them to effectively manage and respond to animal behaviors appropriately.


Normal Dog Behavior


Understanding Body Language


Overall posture, tail position, and individual facial expressions are key components of a dog’s body language. These elements collectively enable dogs to express a range of emotions with varying degrees, thereby adding depth and subtlety to how they communicate their emotional states (Figure 2.3).


Assertive/Aggressive (Distance‐Increasing) Signals


Dogs displaying distance‐increasing body language are often dogs that feel threatened; these dogs are not “mean” or “angry,” and understanding their underlying emotional state is important (Frank 2013). These dogs are attempting to display signals that will prevent the threat, be it another animal or a person, from continuing to approach and encourage them to back away or retreat (Figure 2.4). This type of body language typically begins subtly but increases as the signals are ignored and the threat persists. It is also important to note that dogs whose body language signs have been previously ignored or punished may start at a higher level of arousal with less subtle signs in future situations (Landsberg et al. 2013).

The photograph of yawning dog. It depicts the a black dog sitting in the grass outdoors.

Figure 2.1 Yawning is considered a displacement behavior and an indicator of anxiety and stress.


Source: Mary Swift/Adobe Stock Photos.

A photograph of dog. It shows a dog sitting under the blanket, growling warningly.

Figure 2.2 This dog is giving a warning growl.


Source: Bonsales/Adobe Stock Photos.

A photograph of dog. It shows a whale eye of dog.

Figure 2.3 Example of whale eye (the whites of the eye are prominent).


Source: Mary Swift/Adobe Stock Photos.

A photograph of dog and man. It shows a person stands beside a whale eye of dog.

Figure 2.4 Dogs may back away or retreat when fearful or anxious. Ears may go back, mouth becomes tight, pupils dilate, and the whites of their eyes (whale eye) become prominent.


Source: Mary Swift/Adobe Stock Photos.

A photograph of two dogs and man, stand together in a lush green field.

Figure 2.5 A direct stare is often the first distance‐increase behavior a dog will display.


Source: AstridAve/Adobe Stock Photos.


One of the most subtle distance‐increasing behaviors that dogs display is a direct stare (Figure 2.5) (Siniscalchi et al. 2018). This behavior can be easily overlooked by those not paying attention to mild changes in a dog’s body language; awareness of these subtle signs can help prevent a situation from escalating.


Dogs whose stares have been ignored may progress in the behavioral sequence. Pulling the corners of the lips back and snarling can be the next stage. The snarl may start relatively subtly as well by involving only one side of the mouth or a very small portion of the lip (Figure 2.6). This change in facial expression may be accompanied by growling or barking. As the dog’s behavior continues to escalate, they may lower their head, which can make them appear larger.


As the threat persists, the dog will shift their weight forward and stiffen their legs. They will also piloerect (raise) the hair over their tail, shoulders, and back, which indicates a state of high emotional arousal (Figure 2.7) (Siniscalchi et al. 2018). Throughout this sequence, the dog may hold their tail vertically and may move it in a slow and deliberate manner or display flagging behavior by moving their tail rapidly. Ultimately, the dog’s behavior may progress to an inhibited bite (snap), which will eventually become a true bite with less inhibition if signals are still ignored (Landsberg et al. 2013).

A photograph of two humans and dog. It shows a veterinarian giving a dog an injection.

Figure 2.6 This dog is fearful. Whale eye is present, the brow is furrowed, the mouth tight.


Source: Ivonne Wierink/Adobe Stock Photos.

A photograph of dog's tail. It depicts a dog backside.

Figure 2.7 Piloerection can start at the tail and indicates a state of high emotional arousal.


Source: Wendy/Adobe Stock Photos.


Appeasement Signals and “Guilt”


Appeasement behaviors are displayed in an effort to diffuse tension and decrease a perceived threat. Dogs displaying appeasing signals are seeking to avoid conflict (Figure 2.8). Similar to distance‐increasing signals, appeasement behaviors can range from very subtle to more overt postures. It is important to note that dogs whose appeasement behaviors have been ignored may begin to display aggressive body language.

A photograph of dog. It depicts a dog stand in a lush green field with worried face.

Figure 2.8 This dog is fearful, as evident by the worried look on the face, ears are back, mouth is tight, and body tense.


Source: Mary Swift/Adobe Stock Photos.


Subtle Beginnings of Appeasement

Appeasement behaviors typically start with the dog avoiding eye contact and looking away (Landsberg et al. 2013). The dog may move only their eyes or may turn their whole head and twist their neck to indicate their underlying emotional state more overtly. They may also lower their ear posture and increase the frequency of blinking (Figures 2.9 and 2.10) (Siniscalchi et al. 2018).


Progression of Appeasement Signals

Dogs displaying appeasing signals may also lick their lips and yawn (Figure 2.11). They typically hold their tail low, sometimes even tucked between their back legs. The tail may wag slightly, but this behavior often ceases when the dog is touched as they enter “freeze” mode (Beaver 2009).


Extreme Fear Responses

As appeasement behaviors progress, dogs may lower their body toward the ground and take up a crouched position. They may ultimately completely lay down and even roll over onto their backs, exposing their ventral abdomen (Figure 2.12) (Hargrave 2017a). Dogs may also urinate as their appeasement behaviors continue. When dogs roll over in order to express appeasement, this can be a sign of fear and conflict.

A photograph of veterinarian and dog. It shows a veterinarian trying to interact with a dog.

Figure 2.9 Avoiding eye contact, lowering of the head, looking away, lowered ear posture, and tight mouth are all signs of emotional discomfort or stress. This dog is uncomfortable with this interaction.


Source: donnacoleman/Adobe Stock Photos.

A photograph of the dog with the veterinarian. It displays a vet holding a dog's paws.

Figure 2.10 This dog is displaying appeasement behavior, ears are back, mouth is tight with a direct stare. This dog is not comfortable with this interaction.


Source: donnacoleman/Adobe Stock Photos.

A photograph of the dog. It depicts a dog lick their lips and nose.

Figure 2.11 Dogs may lick their lips and nose as a sign of anxiety.


Source: Firn/Adobe Stock Photos.

A photograph of the dog. It depicts a crouched position of dog in a lush green field.

Figure 2.12 When fearful, dogs may lower their body toward the ground in a crouched position with their tail tucked between their legs.


Source: sue/Adobe Stock Photos.


Misinterpretation as “Guilt”

Many caregivers will misidentify appeasement behaviors as “guilt” (Figure 2.13) (Hecht et al. 2012; Konok et al. 2015; Pickersgill et al. 2023). However, dogs may not necessarily understand the concept of wrongdoing or why a person is upset (Martens et al. 2016). Instead, these behaviors often result from the dog sensing a potential threat from a person’s body language. The dog then displays a range of appeasement behaviors, sometimes even rolling over onto their back, in an effort to avoid or diffuse any aggressive response from humans.


Conflict Behaviors


Conflict behaviors in dogs arise from a state of internal conflict, where the dog experiences opposing desires or motivations. A common example is a dog greeting a visitor: in this case the dog may want to interact with the new person but simultaneously be feeling fearful of them. These conflicting motivations can lead to significant stress and anxiety in the dog, which are evident in their body language and behavior.


Misinterpretation of Behaviors

A classic example of misinterpretation is when a dog rolls onto their back. Not all instances of this behavior are solicitations for attention. It could be an invitation for a belly rub, but it could also be a sign of extreme conflict or uncertainty. In situations where the dog shows a direct stare, tight mouth, ears back, tail tucked, and stiff legs, which are indications of distance‐increasing behaviors and signal discomfort, it is best to avoid an interaction. Instead, walk a few steps away and call the dog. This helps to determine their true motivational state and whether they are soliciting attention or asking for attention to stop (Figure 2.14).


Mixed Postures Due to Emotional Discomfort

Conflict behaviors often manifest as a mixture of postures, reflecting a dog’s emotional discomfort in a given situation. Typically, these dogs are experiencing anxiety or frustration. They may have learned that their subtle warning signs, such as avoiding eye contact, leaning away, or even growling, are routinely ignored or in some cases punished (Figure 2.15). This can lead to an escalation in behavior. For these dogs, aggressive signals can become the default behavior once they learn that they are effective in stopping uncomfortable situations. While punishment may suppress these signals, it does not address their underlying cause. Furthermore, punishment can result in the loss of early warning signs, potentially leading to an escalation in aggression with little to no warning.

A photograph of the dog and a man's hand. It depicts a dog stand on a bed surrounded by soft white foam.

Figure 2.13 Guilt is often misunderstood. Often the body language observed is not guilt but rather fear and anxiety, such as the dog in this picture (ears back, avoiding direct eye contact, dilated pupils, closed and tight mouth).


Source: Rawlstock/Adobe Stock Photos.

A photograph of the dog. It depicts a dog roll on their back.

Figure 2.14 Not all dogs that roll on their back are soliciting attention. In this photo the dog has a direct stare, tight mouth, ears are back, tail is tucked, and legs are stiff, all indicating distance‐increasing behaviors.


Source: Алексей Игнатов/Adobe Stock Photos.

A photograph of the dog and a man's hand. It depicts a dog holding a man's hand.

Figure 2.15 This dog is conflicted, as evidenced by him looking away with his ears back and open mouth in a pant.


Source: Hanna/Adobe Stock Photos.


Simultaneous or Alternating Behaviors

Dogs in a state of conflict may display a combination of aggressive and appeasing behaviors at the same time. For example, a dog might tuck their tail while leaning forward, or alternate between appeasing signals like lip‐licking and yawning and more aggressive behaviors such as growling. Some will display a grin (retract lips and display incisors). This alternating or simultaneous display of behaviors is indicative of the dog’s internal conflict and emotional discomfort (Landsberg et al. 2013).


Display of Displacement Behaviors

Dogs experiencing conflicting emotions may also engage in displacement behaviors, which are essentially stress‐relieving actions. These can include spinning in circles, shaking their heads, or other repetitive actions that do not seem to have a clear purpose in the context of the situation (Table 2.1).


Solicitous (Distance‐Decreasing) Signals


Solicitous behaviors are invitations to interact and play and communicate that the dog is happy and comfortable in the environment. These dogs will have a relaxed face (Figure 2.18) and loose body posture. During appropriate play, dogs may offer a play bow, lowering onto their forearms while elevating their tail, (Figures 2.16) (Beaver 2009) take turns, and use good bite inhibition (Siniscalchi et al. 2018). It is important to monitor dogs closely during play to ensure that the situation is not escalating and that all dogs are still enjoying the interaction.


Table 2.1 Signs of stress in dogs.


Source: Adapted from Hargrave (2015).






Appears tired or disinterested
Barking
Biting
Biting/chewing on leash or caregiver’s hands/clothing
Blinking
Closing eyes
Crouching
Ears back and/or flattened
Easily startled, ears twitching as if listening
Excessive salivation
Full body shake
Furrowed brow
Growling
Hypervigilant (scanning and trouble settling)
Ignoring familiar cues
Involuntary urination or defecation
Lip/nose‐licking
Lunging
Lying down
Mounting behavior
Moving away, avoiding contact with hands
Not eating/refusal of food or snatching treats
Pawing
Piloerection (raised hackles)
Raised paw (foreleg)
Rolling over
Scratching at neck
Shaking/trembling
Shedding
Showing whites of eyes (whale eye)
Sitting close to caregiver
Slow deliberate movements/moving in slow motion
Snapping
Sniffing ground
Staring
Stiff body/muscle tension
Sweaty paws
Tail tucked
Tail carried high with tight wag
Tight mouth
Turning body away
Turning head away
Urine marking
Walking away
Yawning
A photograph of the dog. It depicts a dog playing bow in a lush green field.

Figure 2.16 A play bow is often a distance‐decreasing behavior.


Source: Mary Swift/Adobe Stock Photos.

A photograph of the dog. It depicts a dog playing belly rub in a lush green field with human.

Figure 2.17 This dog is comfortable with a “belly rub,” as indicated by the almond‐shaped eyes, relaxed face, and tongue position (hanging loose out of the side of the mouth).


Source: Mary Swift/Adobe Stock Photos.

A photograph of the dog. It depicts a dog tongue out to the side.

Figure 2.18 This dog is relaxed and engaged, as evidenced by the relaxed face, almond‐shaped, soft eyes, and tongue out to the side.


Source: Mary Swift/Adobe Stock Photos.


Domestication and Its Effect on Behavior


Domestication has had a substantial impact on dog behavior (Fuller and Fox 1969). In many ways, domestication has made it easier for humans and dogs to communicate with each other (Driscoll et al. 2009; Feuerstein and Terkel 2008). However, there are also several challenges that have resulted.


Domestication has brought numerous benefits to the human–dog relationship. Dogs have developed a remarkable ability to understand human social cues and can learn by observing human actions (Udell et al. 2010). Compared to wolves, dogs generally show less aggression and avoidance behavior toward people (Lazzaroni et al. 2020). Instead, they exhibit a preference for human contact and often look to humans for assistance in challenging situations (Marshall‐Pescini et al. 2017). Dogs are more inclined to depend on people in dangerous scenarios and tend to form bonds with their caregivers that can easily extend to other humans. They exhibit less fear toward people and are genetically predisposed to increased sociability (Lazzaroni et al. 2020). This shift includes changes in the hypothalamic–pituitary–adrenocortical axis, which affects their stress responses. Additionally, the presence of the levator anguli oculi medialis muscle in dogs (absent in wolves) allows them to significantly raise their inner eyebrows, enhancing communication with humans (Figure 2.19) (Kaminski et al. 2019).

A photograph of two wolves. It depicts a standing two wolves.

Figure 2.19 Although dogs share similar genetics to wolves, they are a different species of animal.


Source: diartemisss/Adobe Stock Photos.


The Role of Breed in Interpretation


When considering a dog’s body language, it is important to account for the dog’s breed, as selective breeding has further modified physical traits (Wheat et al. 2019). For instance, brachycephalic breeds have a reduced ability to display a full range of facial expressions due to their unique physical structure. Some breeds, like the French Bulldog and Welsh Corgi, have been bred to have short tails, which limits their ability to communicate using tail position and movement. Additionally, breeds like the Spanish Water Dog and Rhodesian Ridgeback have distinctive hair coats that affect their communication abilities. These coats can impact their use of piloerection (hair standing on end) in communication and may obscure facial features. These breed‐specific differences not only affect the dog’s ability to perform body language signals, but they also make it more challenging for other dogs and people to accurately interpret these visual communication cues.


Social Behavior


Dogs are inherently social creatures, capable of recognizing their kind even after prolonged periods of separation (Hepper 1994). Free‐roaming dogs often form social groups, though the concept of “dominance” as commonly perceived is a misconception of their social interactions. Rather than rigid hierarchies maintained by aggression, social structures among dogs are typically established through displays of appeasement and affiliative behaviors that foster group cohesion (Bradshaw et al. 2009; Bradshaw and Rooney 2016).


In any given situation, a dog’s behavior is influenced by various factors, including the value they place on a resource they wish to control and their past experiences. For instance, a dog that has repeatedly experienced fear‐based aggression may start to show fewer appeasement signals over time if those signals have been consistently ignored. Dogs also assess and interpret the behaviors of other dogs, making judgments about whether a situation will likely be resolved through escalation or appeasement. Interestingly, the relative sizes of the dogs involved do not appear to significantly influence these interactions (Bradshaw and Lea 1993).


Dogs also make use of a variety of vocal communications, including barks, whines, and growls. The specific acoustic profiles of each vary with the context (Yin and McCowen 2004). For example, barks are typically low‐frequency sounds when directed toward a stranger but high‐frequency and more musical when performed during play. As another example, a growl emitted during play has a different sound quality than a growl emitted during guarding behavior (Farago et al. 2010). Further, dogs attune to and respond to the vocalizations of other dogs in a context‐dependent manner as well (Farago et al. 2010; Yin and McCowen 2004).


In fact, dogs use vocal communication as well as visual signals to initiate and maintain play. Play behaviors are usually behaviors that are also exhibited in other situations; for example, play behaviors often encompass behaviors performed while hunting or mating. However, there are major differences in the nuance and specifics between the different contexts. For example, biting during play is typically inhibited and does not lead to injury, whereas biting during a fight or hunt is often uninhibited and meant to injure.


Throughout play, dogs pay attention to the communication signals of their playmates to ensure behaviors are properly interpreted (Feuerstein and Terkel 2008).


Reproductive Behavior


Differences from Wolf Pack Structures


In contrast to wolf packs, which are family units with both paternal care and parental assistance in raising offspring, dogs, especially in feral conditions, do not form family groups. This represents a significant behavioral shift resulting from domestication and adaptation to different living environments (Pal et al. 1999). Feral dog colonies typically consist of a small group of adults, usually between five and ten individuals, along with their dependent offspring (Pal 2011

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Mar 1, 2026 | Posted by in NURSING & ANIMAL CARE | Comments Off on Normal Behaviors and Body Language Interpretation

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