Big J writes: “When Ronon was introduced to Stargate Atlantis, he remarked that he couldn’t be fed upon. The new info (a teaser for the episode) says that Ronon is fed upon and given life over and over as torture. How can this be possible?”
Answer: Ronon never said he couldn’t be fed upon. He told his story to Teyla and we witnessed a flashback in which the wraith was about to feed on Ronon then stopped, reconsidered, and made him a runner. We discussed this scene with the writer, Rob Cooper, two years ago and, in his mind, the wraith didn’t stop because he was unable to feed. He stopped because he was so impressed with Ronon’s defiance that he realized he would make for great sport - and thus made him a runner.