Nervousness can be thought of as a state in which your dog feels a heightened sense of apprehension and uneasiness. There are occasions when dogs require a degree of apprehension to ensure their own well-being. An example would be a dog that chooses to move off a roadway because a car is approaching. However, nervousness can be debilitating if it is experienced in contexts that would not generally elicit a nervous response or that trigger nervousness to an abnormal degree.
What are the Signs of Heightened Nervousness?
Dogs that are nervous have certain physiological reactions that will cause changes in their appearance and behaviour. There are breed and individual differences in how these are expressed. Some of the more common signs that a nervous dog might display are:
- Dilated pupils (the eyes can appear very dark)
- Increased respiration (panting)
- Increased heart rate (you might be able to feel the heart pounding in the chest)
- Muscle rigidity or trembling
- Hyper-vigilance (scanning the environment for potential problems)
- Increased startle response (jumping out of his skin at minor stimuli eg a quiet hand clap)
- Tail tucked under
- Rolling onto the back to expose the belly
- Urination
- Loss of appetite
- Vomiting or diarrhoea
- Excess salivation (dribbling)
- Hackles raised
- Agitation or hyperactivity
- Displacement behaviours such as yawning or sniffing
- Lack of response to owner direction
- Hiding or choosing to withdraw
- Repetitive behaviours such as circling, pacing or tail chasing
- Aggression
It is important to recognise that some of these signs can be expressed when your dog is not nervous. For instance, your dog's pupils will dilate if he enters a dark room or he may vomit because he has eaten your mobile phone (now you're nervous!).
Why are Some Dogs More Nervous than Others?
Genes, the environment and learning all play a role in how nervous a particular dog becomes. Dogs can be specifically bred to exhibit nervous behaviour - extreme fear responses are seen in "nervous" dogs who have been experimentally bred to maintain profound avoidance of humans. This helps to illustrate the important role of breeders in selecting non-nervous individuals to breed with.
The early socialisation and life experiences of puppies also play a vital role. The brain has a period of plasticity at this age that will never be repeated. Providing the pup with positive experiences to a wide range of stimuli and varying environments will give you the best chance of her growing into a confident, relaxed individual.
A small amount of experience prior to 16 weeks of age can have a large influence on future behaviour. Learning continues throughout adulthood. Continuing to manage and train your dog appropriately can still provide significant benefits. Your aim should be to produce the best dog you can, given her genetic predispositions.