Lip licking, yawning, wide eyes, and spiked fur: These are all are indicators of a stressed dog. It is important to always asses the exact situation. If a dog is lying on the couch by itself and licks its lips, most likely it is not stressed. If a dog is being hugged, tugged on, etc. and begins to emit warning signs, this is a clear indicator that he/she is now stressed.
Growling and snapping: Never try to get a dog to stop growling; we WANT it to growl, as it lets us know that he/she is uncomfortable. If a dog gets in trouble for growling, it will stop and can immediately go to biting.
A stiff wagging tail: A dog that is experiencing stress will wag its tail in a stiff manner (a telltale warning sign that it might bite). Look out for a tail that is pointed high and moves even more quickly back and forth.
Averting their gaze: Avoidance behavior indicates that the dog is not comfortable with the particular situation.
Cowering or tail tucking: This behavior indicates that a dog is fearful. It doesn’t necessarily mean the dog will bite, but it could if the dog’s fear continues to increase.
Backing away or hiding: Whether the dog backs itself into a corner or tries to hide (under a chair, table, bed, crate, etc.), this is a clear indication that the dog is uncomfortable and trying to escape. It is important to leave dogs that are exhibiting this behavior.