So I have been trying to get him to eat earthworms. Not easy so far! He won't touch them, but...
If I cut the worms up in little pieces and crush snails mixing them all together he will eat the worms with snails! He is starting to get better about eating worm chunks. But he blows on the snails and makes the worm bits float away, I scoop them up and mix with the shells again. Repeat.
At first he only ate one little bit, but once I saw that I knew I could get him eating more - just been a bit of work.