How are the snakes set up? What kind of lizard are you using? The snakes need a warm area 82-86 degrees and a cool area about 70 degrees and a tight, dark hiding spot. The lizards most often prefered are Cophosaurus species. Try offering baby Sceloperous (Fence Lizards) or Uta (Side-Blotched Lizards). If that doesn't work or you can't get any lizards push pinky pieces (legs and tails) lubricated with water down their throats with a blunt intrument, a large sexing probe works well or pinky pump them. Do a search of this forum on feeding and you should get alot more information.