I've been feeding mice and a nightcrawler inbetween and extending time to 10-14 days between mice as I believe some of my snake have become big boned (fat) so they are on a maintenance diet. I do agree with Don, if you feed only worms there is a lot of dirty black poop to clean up compaired to rodents. I started all my babies this year on worms instead of fish, and now have them eating cut worms and pinkies mixed, and while the grown rate is the same maybe better there is a lot more mess to clean up.