the mail order orps are a week and a half. i threw in a bug from the yard and they are hunting already, very impressive for babies. we're trying to handle them so theyll be tame. the wife actually changed the shredded newspaper yesterday, wow. i'm not being real serious with the heat. as long as they are spread out in the tub lounging instead of huddling or staying away from the light to cool down i believe that is ok. the petco thermometer is garbage. just saying hi, thanks.