How long is too long to go without food?

[shayna]

Sorry if this is a repeat post, but I haven't been able to find what I'm looking for in the search.
Close to two months ago I purchased an '09 male spider ball. The breeder told me he was eating f/t or live rats. He hasn't eaten anything since I brought him home. I know two months isn't very long for a snake his size to go without food but I have tried white rats, brown rats, spotted rats, African soft furs, and braining with no luck. His temperatures are 90-95 on the warm side (averaging around 92) and 75-80 on the cool side, humidity is around 50%. I'm hoping to not have to feed live, if possible. This is my first ball python so of course I am a little paranoid. Does anyone have any suggestions or insight?