Even the friendliest dogs can be quite dangerous, and their outbursts of aggression are not that unpredictable - it's just not always possible to notice the signs.
Most dogs (especially well-trained ones), as ADVICE.NEWS reports, are trying to show you that sometimes it is better to leave them alone, and your goal is to understand this.
Here are some important signs to look out for to avoid possible injuries.
Avoidance
If your dog actively moves away or turns away when you try to touch him, this is a clear sign that he is not in the mood for contact.
Tension
A tense or stiff body indicates discomfort. If your dog tenses up when you approach, it's a subtle way of saying that he's uncomfortable being touched.
Yawning or licking lips
Dogs may yawn or lick their lips when they feel stressed or anxious. If this behavior occurs during or after petting, your dog may be signaling discomfort.
Half-moon eyes
When a dog develops whites of the eyes, known as "whale eyes" or "half-moon eyes," it may be a sign of anxiety. Be wary if you notice this expression.
Closed mouth or pursed lips
If your dog closes his mouth tightly or purses his lips when you approach, it may indicate that he is not interested in being touched.
Ears are pressed back
Although some dogs naturally have ears that lay back, suddenly flattening the ears against the head can signal discomfort or a desire to avoid contact.
Lack of eye contact
If your dog intentionally avoids eye contact and looks away when you try to touch him, this is a subtle way of expressing his desire for personal space.
Sudden scratching
If your dog starts scratching more than usual during play and affectionate cuddles, it may be a sign of discomfort.
Tousled scruff
Raised fur on the back does not always indicate aggression.
In some cases, this may signal fear or discomfort, meaning that the pet does not want to be touched.
