yeah, ive bred mad.mad.s standings and peacocks. some clutch mates will be fine together for their entire lives and others will fight right off the bat. the best thing to do with hatchlings is really to keep each one in its own seperate container. somtimes i keep them together for a month or so but the aggression is most obvious during feeding time. i have had some babies [standings and mad mads] that will not even go for the food itself, but wait for its clutch mate to grab the food and try to steal it from 'em. its really dependent on their personalities but its better to be safe then end up with a scared or tailless gecko.