my 2 female leos havent eaen in a while. i have held food under their noses, and they have walked away. my male has no problem. the gals are losing weight, and to say im worried is an understatement!! i keep them on calcisand, and they had no problems for the first 12 months, so i thought the substrate was OK. the temperatures are at the top end, as they are ALWAYS under the heatlamp. the humidity is alright, and i have no idea what is wrong with them. also, last year they mated and layed eggs. the eggs appeared fertile, but in the last half of incubation they went mouldy. they are also a bit lethargic. i have tried everything, but cannot find the solution. is it impaction??? should i change their setup?? please help me!!