I fed my snake rat fuzzies every 4 days till he was around 230 grams. The fuzzies were about 13 grams each. The rat pups I got from BC are around 30g each. To give you an idea of weight gain (at least from my experience), you can expect an increase in the snake's weight of around 35-60g a month with the 10-15% per week feeder rule. When I started measurements in mid April 2014, he was at 141g. He's at 295g as of this morning. He's been getting a rat pup weekly for the past month, when he weighed 240g at the start. I'll be moving him to a 4-5 day feeding interval of pups this week.