In 1882, Jumbo was the biggest elephant living in captivity. Bartlett thought it best to find a new home for Jumbo for two reasons. First, he thought Jumbo was about to enter "musth". This is a difficult time in a male elephant's life. Certain glands in the elephant's head become inflamed causing the animal to behave violently. The other reason Bartlett wanted to move Jumbo was the elephant's close relationship with Scotty. Bartlett thought Jumbo might go on a dangerous rampage if Scotty should die.