An animal medicine reminder tag that is non-toxic, water resistant, and shock resistant is disclosed. The tags described herein are can be used as medicine compliance tools as they are automatically activated when attached to the companion animal and produce a persistent reminder after a manufacturer-programmed set period of time which cannot be reset or turned off by the owner.They are designed to be minimally harmful if accidentally swallowed, and may even pass safely through the gastro-intestinal tract for sufficiently large animals. The tag has a housing (10, 11) in which a hole (3) for attachment is made. The timer is set off by passing a connector through the hole, breaking a frangible sensor (4a). The tag contains a PCB, battery, and an alarm indicator. The alarm indicator could be an LED and/or an audio generator.
