People experiencing anxiety attacks are triggered by a stressor in the environment, however, the anxiety reaction can far exceed that of what a non-anxious person would experience. Symptoms such as shortness of breath,a racing heart, muscle tremors, foot tapping, or leg bouncing, or other involuntary movements may occur. These symptoms can act as triggers for a vigilant anxiety detecting dog to pick up on, before the person suffering the anxiety attack is even aware that their anxiety level is rising. The service dog can alert the person to their rising anxiety level, providing distraction, allowing owners to consciously engage in anti-anxiety activities to bring down their anxiety level, receive medication, or remove themselves from the anxiety-producing situation. In addition, some anxiety detecting dogs are also taught to provide comfort such as deep pressure therapy, or other anxiety relieving behaviors. An anxiety service dog may help guide a confused person to a safe place, alert a loved one, or put their body between the person and others to protect them and give them a sense of security.
Service dogs must have quiet, calm temperaments so they can be used in public, but be alert enough to pick up on small cues that an anxiety attack is occurring, and motivated to work to alert their handlers and provide comfort. Most dogs begin training at 1-2 years of age, and training can take several months to a year or more. Dogs are trained to alert their handlers with a predetermined alert such as a nudge of the leg or the hand, which gets the handler's attention and allows them to initiate steps to prevent their anxiety from escalating further.
Before training, you will need to determine what alert you will want to have your dog use to let you know that anxiety levels are rising. Frequently, a nudge with the nose is used as a signal. You will also need to identify what symptoms of anxiety you manifest that your dog will need to alert on. For example, increased heart rate, breathing rate, muscle movements, scratching, or touching your face are all possible signs people exhibit when their anxiety level starts to rise. Lastly, you will need to determine what actions you want your dog to take to help you reduce anxiety, lead you away from the situation, provide DPT, or fetch medication are all possible tasks your anxiety service dog can perform to help resolve anxiety conditions. All service dogs being used in public places will need to be well socialized and obedient in a variety of circumstances and around a variety of people, so a lot of work to establish the dog is comfortable working in various situations prior to training will be required. You should also investigate service dog certification requirements in your area.