Disclosed modular animal collar systems include a D ring exoskeleton system, a breakaway latch tongue system and other systems. Disclosed collars include auto release systems to ensure that collars do not choke or otherwise injure a pet. Collars include sophisticated electronics to commutate with a pet owner's smart phone but also include means of communication not requiring the use of a smart phone. Collars may include a base collar containing a micro controller and other computer related components. Surrounding modular components may contain additional equipment and may be added as needed by a pet owner. Disclosed collar functions are executed by the disclosed collars and facilitate the retrieval, care and training of a pet.