I have a pastel that's 2 years old now, and she's over 1500 grams. She's gorgeous, her proportions look great. She's been on a 5 to 7 day feeding schedule, and she went through her 'threshold' fasting period February through May this spring--didn't eat a thing for 4 months.
Her mother is a 5 ft 3500 + gram female. I am going to try to breed her this year, as she'll be well over the safe weight, and I feel she has the bulk and appetite to handle it (she'll be a lot bigger by then, too). I'm hoping she's going to be a great big girl just like her mom.