Im tring to find out how much my little minnie should weight she looks so thin but is super active?? she is 3 months old. she also the smalest of the litter and wasnt suppose to survive do to her size. she eat pretty good and loves her treats, mostly chicken strips. but im just worried cause i have never had a rattie before or a lean breed so im concerned. thank you all for your help

Tinkerbelle was about 5-6 lbs at 3 months.  She is not a mini, but a small standard...meaning that as an adult she weighs 13 lbs. The smaller ratties, mini's or toys, weigh less than 10lbs as adults.