I recently got a male ball python that was two years old but was only 300 grams! After two feedings with me of weaned rats, I weighed him again after he shed and pooped and he weighed 390 grams, that’s a massive increase in weight and I’m just wondering if this is normal for an underweight snake? Also any advice on getting him up to weight would be appreciated as this is my first time dealing with an underweight snake, thanks.