There are only a few rules governing emotional support animals, and there isn’t any official registry, therefore it’s really hard to establish how many there are. Both service and emotional support animals could be excluded from the workplace should they pose either an undue hardship or an immediate threat at work. Registration isn’t required by law and doesn’t make your pet an ESA. The individual must require the register pet as emotional support animal ESA to be able to conduct major day-to-day living activities. The animal needs to be vaccinated with respect to state and local laws. They are different from service animals, because they can be of any breed.