Back when I had a large collection of Jungles and Diamond X Jungles, it was in the somewhat early times for carpets...this was around 1993. I was unaware of the problems associated with getting jungles to take rats. Needless to say, I had a several large adults that would not touch a rat. Try to get them switched over as soon as possible. It's best to get them on rat pups as hatchlings. Trying to switch an adult or even a sub-adult can present problems. Good luck.