Excellent stats on her!! Bella is 15 days old but only 5.5 oz. It is likely that your cutie is purring; in the beginning, they rumble inconsistently, like a gas powered engine that needs a carburetor adjustment As far as bowel movements go, tinies can skip a few days because they are digesting their formula well plus they don't have all the gut flora developed yet - poop/manure consists of a good percentage of dead bacteria. (the things we learn when we have our own medical issues ). If she goes #2 before the vet visit, try to keep the stool sample to show the vet. ...ah, TCS - the site where poop is readily discussed and normal b.m.s are cause for celebration