i thought it wasn't in the nature of a royal python to eat pre killed. we were going to get one but were told bythe petshop man that we've known for years they only eat live?

?
He's a complete idiot

I suggest you tell him that, seriously.
Royal python's can be very finicky eaters, and especially when you start of by feeding them live to thawed or visa versa.I don't think I could bare feeding a little live mouse to a royal python, i've seen it on youtube and to be frank its just wrong when you have the option to use pre-killed.