Don't sweat this at all. Adult carpets will eat when they're ready. You look to have a great, healthy looking jungle !
...and he's probably a mouser from here on out....if you want him to eat, offer mice...you'll most likely be banging your head against the wall trying to switch him back over to rats. ...I've got adult carpets that only eat mice, so be it, no biggie...
Shea Peterson
www.petersonreptiles.com