An implant (small radio transmitter) can be used as an alternative to collars. Using an implant is not optimal for wild dogs as minor, invasive surgery must be performed to place the implant either subcutaneously (under the skin) or in the peritoneal cavity (under a muscle layer).
For this reason the use of implants is not recommended or supported by WAG. However, in areas where tourism is the main priority implants are sometimes favoured to what can be perceived as an unsightly collar. Implants can also be beneficial to physiological studies as they can measure body temperature and heart rate. A major drawback of implants is that signal range can be negatively affected by the animal’s tissue surrounding it.