JCP's not eating is not very common. They tend to have very strong feeding responses. Even though they love to perch, it's always best to offer them a hide. Mine all have them and all use them. Majority of the time they will perch on top of the hide or braches etc, but use them after eating and during sheds mostly. A little more info would be nice though, such as how old/large is the snake, what type of meals are you offering, whether mice or rats, is the snake losing weight, frozen thawed or live, etc. More information will help us help you!