We need to examine and reconsider ideas and beliefs, particularly about religion and spirituality, which restrict and restrain us. We are being warned that we are enforcing too much restraint on our hidden abilities. We could be allowing others to hold us back. The cage normally represents a form of trap or jail. To dream of caging a wild animal alerts us to our need to restrain our wilder instincts. To dream that we are in a cage indicates a sense of frustration and perhaps of being trapped by the past. You may also like to look at the entries for Jailer and Prison.