I think getting her up to 1200 grams and then start a cool down. after cooling for 2 weeks if she's still eating, place a male with her. don't rush for 600 grams. she already has a good weight to her length by the looks of her in that pic. breeding season is long. if she continues to feed thru it, and by the time she ovulates she should be over 1500 grams. if you rush and slam her with food, this can throw her off feed. and with the age that everyone talks about. she old enough to produce follicles or she's not. I have eggs in my incubator from females that won't be 2 until sometime this month. and the one clutch is due around the 12 of aug. with 7 good eggs. she had good weight to support having eggs, if you try and breed a female that's not muture, what's going to happen? nothing, but maybe her retaining sperm and you have to be aware of that for the next season.