Vocalization is normal self-expression in dogs but may be intensified when they are under stress. Dogs that are afraid or tense may whine or bark to get your attention, or to self soothe.Yawning, drooling, and licking.Dogs yawn when they are tired or bored, they also yawn when stressed.
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There are a number of signs that may show that your dog is stressed, which include:
Stress signs to look for include whale eye (when dogs reveal the whites of their eyes), tucked ears, tucked tail, raised hackles, lip-licking, yawning, and panting. Your dog might also avoid eye contact or look away.