Yeah thats been my experience. I have been raising around 9 animals for the last year from hatchlings to their current weights of 1000g+. They choose when they will feed and when they wont. There are things you can do to entice them to start eating again but ultimately its their choice. I have gone through a 4 month fast from the majority of my collection and I have also had certain females eat every 3 days which aren't overweight.