I have a calico I got as a hatchling that refused to eat after i got it. I tried everything mentioned and he wouldnt eat. I then assist fed him a prekilled mouse hopper soaked in warm water. After he was done eating the prekilled I offered a live mouse hopper and he took it followed by another live hopper.

He has been a consistent mouser on a 7 day schedule. He wont eat rats and has been my only 2012 on live but at least he is eating. Somethimes they just need a little help to get started.