
So last night, whilst scrambling for something to read on the can, I grabbed my Dune book and started reading through Appendix A to try to enlighten myself. I didn't get my answer (didn't get very far, was very late) but I did get to a point where Pardot Kynes explained the early early stage of the sandworms, the sandtrout. I don't have the exact quote handy, but he said that the sandtrout eventually enter a dormant stage, and they remain that way for many years until they emerge as little makers. I think it said 3 or 4 years. I suspect I misread that though, judging on the the length of a sandworm's lifespan.
I intend to read the rest of the appendix at some point in the next few days, but here's an interesting thought that struck me while reading that part about sandtrout: Do you think Leto II would have entered a similar 'cocoon' stage early on in his rule? I think it would stand to reason that he would. He took on a near identical worm shape 3500 years after he took the sandtrout skin, so he must have gone through many if not all of the stages of Sandworm metamorphisis.