smith, i always make sure to zero out the scale. i even checked their weight twice just to make sure. goliath ate a 60g rat on 2/15 and a 57g rat on 2/21. anne b ate a 150g rat on 2/15 and a 104g rat on 2/21. those are the feedings between the weights. goliath will eat anything you give him and anne b got back on feeding on 1/31 plus i've been pairing her with some boys