When I got my GHI she was 55 grams. she is just over 2 years old now and is the biggest girl of my collection at 1700+ grams. It was nerve racking because she would not take F/T for the first month and I couldn't find anything live that was small enough to offer. Ended up giving her the smallest adult mouse at petco I could find. After that she started pounding f/t and never stopped. I'm actually afraid to put a male in with her because her feeding response is so aggressive I'm worried she'll try to eat him...