That depends on your definition of crazy, but, if they aren't properly stimulated and exercised, then yes (at least by my definition). Wild animals are more prone because they are used to far more exercise and stimulation than they can get in captivity, usually. Some go utterly crazy and have to be relocated, released back into the wild or put down, but most just display signs of neurotic behavior due to lack of enrichment (or, in layman terms, boredom). This is especially true of wild animals kept (or attempted to be kept) as pets by people who are not educated on the proper ways to do this.
Elephants will sway their head side to side (although sometimes this is a body gesture/communication) and bears will too. Some animals will pace constantly. Even house cats and dogs will do crazy things when they are not stimulated or exercised enough, like spin, chase their tails, bark incessantly, and generally "act-out."
Elephants will sway their head side to side (although sometimes this is a body gesture/communication) and bears will too. Some animals will pace constantly. Even house cats and dogs will do crazy things when they are not stimulated or exercised enough, like spin, chase their tails, bark incessantly, and generally "act-out."