Party has taken baby wyvrens as pets. What’s the best way to handle this?

@ChrisPerkinsDnD first time DMing and the team has now taken baby wyvrens as pets. What's the best way to handle this?

— damon brown (@dcbrowner) July 20, 2017

Given wyvern temperament, the characters might want to invest in some antitoxin. #WOTCstaff https://t.co/yRO6RaTbEC

— Christopher Perkins (@ChrisPerkinsDnD) July 20, 2017