Boosting feeding to promote growth IMO is not the way to go. It is proven in any creature to have a negeative impact on their life. Why rush things? As Freakie frog said, each animal is different. We have had females hit over 1kg their first year and others that are around 500g. They atain their size at the rate thats right for them. We never "try" to get them bigger faster. We let them decide. If they want to eat, feed them. They will either gain weight faster or slower than others. We have 4 year old balls that havent past the 1200g mark and 2 year olds that are over 2k.