What is in the gum?

Sooooo  bubble gum....oh my god what a disaster bubble gum is in my home.  Mcgoo loves gum, loves gum..but god what it does to the poor little girl.  She was a nut case tonight, but I am teaching her that it is the gum that is doing it to her.....How can something so simple send her over the edge .  She is trying so hard.. the poor pet....so young and so tortured ...tortured by gum....