In history, there have been instances that people traveled to distant places and their "common cold" (not an exact cause but a figure of speech) became the "plague" that wiped out an entire race or specie or vice versa.
There are other unintended consequences to help raise endangered species - it could form bonds so strong that they could never return to their natural habitat or environment and become a pet or cage animal - like it or not.
All the best!
All the best!