It is uncommon for animals to need to be sedated. This would only usually happen if they were so painful that any touch or stimulus causes them to be painful. Perhaps surprisingly, cats and rabbits often accept acupuncture treatment very well.

Acupuncture needles stimulate nerves that do not cause the unpleasant feelings of pain that we are trying to treat. They stimulate other nerves that send a more important message to the brain, which is how they block pain. Sometimes animals may react to this sensation as though they are expecting pain, but then relax because it [...]

It works through the nervous system. The needles block the pain messages and encourage the brain and central nervous system to produce more of the body’s natural painkillers. In conditions that are not painful, acupuncture may help to reset the body’s normal functioning.

Acupuncture is the practice of inserting fine, solid needles into the body for pain relief or, in some cases, to help the body deal with other diseases.