So on our BP, if the Hopper Rats are Not leaving a lump are they still too small? Like I said, they were a little shy of being exactly 15% of her body weight. I don't want her to be under fed. We don't always stick to a 7 day planned schedule anyways, more like every 5-6.. She'll usually hang out in her hides for the most part.. If before 7 days rolls around and she gets hungry, she will come out and sniff the air and roam a little. So we feed her early if she does this, if not we wait 7 days.