Noise phobia consists of a sudden and profound response to noise that leads to intense anxiety (in other words, panic) or attempts to escape confinement. The most common form is fear of thunderstorms, although fear of fireworks or other
loud noises is also frequent.

Compulsive disorders are repetitive behaviors that occur out of their normal circumstances, or much more often or for much longer periods than is normal (for example, incessant licking). The dog spends so much time doing the compulsive
behavior that it does not have time
for normal activities.

Separation anxiety is a syndrome in which a dog panics when it is left alone. It causes intense anxiety and may lead the dog to bark, pace, or eliminate inside the house. Dogs that are confined commonly destroy kennels, walls, or doors in an attempt to reunite with their owners. Signs are often most severe within the first 15 to 20 minutes of the dog being left alone.

The Merck/Merial Manual for Pet Health. Copyright© 2007 by Merck & Co., Inc.,
Whitehouse Station, NJ, USA. All rights reserved.