i am having this exact same problem. i am trying to feed frozen but thawed mice. i have been having my snake for a little over 3 weeks now. petco feeds on thrusdays, and i purchased the snake on a wednesday, so it has almost been a week since it has eaten when i got it home. i then waited 2 weeks before trying to feed, so it has been total 3 weeks since the snake has eaten. my attempts were unsuccessful, so i waited another week and will be trying again tonight. my python simply seems scared of the food.