These are not fast growing snakes, you will not see drastic growth changes in these snakes. They have slow metabolisms and grow slowly. My yearling is 9 inches long, my newest neonate is about 7-8 inches long. Even my oldest wc female who's probably between 3-4 years old is only about 2 feet long. I cannot stress enough that you will NOT see growth in Candoia like you will in other snakes, especially not along the lines of the growth of most colubrids or common boas. That said, overfeeding can and will stress these snakes and they are fragile enough as neonates that they can (and do) die from it. Feedings every 14-21 days seem to work best for neonates in my experience. I've heard of feeding them every 10 days, but my youngest and smallest snakes will not eat with that frequency.
Cease the force feedings completely (which should only be turned to in the event a snake is losing weight, not just refusing to feed on a schedule we keepers determine) and allow the snakes a rest period. Force feeding stresses the snake, and stress can cause a decline in health or even death. Allow the snakes at *least* 2-3 weeks from your last attempt at feeding them, then offer them an anole (since they've already eaten them for you). If they don't eat it, give them another week and try again. The rest period is doubly true if they've been regurging their meals. Regurging takes a lot out of snakes, especially neonates. They need a rest period after such an event, preferably also in the 2-3 week range, to allow their systems to settle. Patience is the key with these little snakes. And despite their appearance, I've found that even my newest, smallest neonate can eat a day old live pink.
Another thing to check is your temperature ranges and humidity levels. These snakes do not like the same temperature ranges as most boas and pythons. Too much heat can cause death, especially with neonates. The temps should be around 80F, nothing more than 84F. The humidity levels shouldn't really be below 60%. They should also *always* have plenty of fresh water provided in a bowl large enough for them to soak in. They should have nice snug hides, and branches don't hurt - my little ones can almost always be found perching on a branch or any elevated spot in the cage. If you have the correct setup and proper temps, plus give them a break from all the feeding, you should see them turn around. I'm sure I speak for all of us here when I say that we'll be glad to help you through this, just keep coming back. If you're in central Virginia, I'd be glad to offer any direct assistance I can.
Don't give up! They really are great little snakes...just require a bit more effort than many of the other boas & pythons out there.
Raven