Well It sounds like you are going to get them regardless so I'd just try them then. What NYHC4LIFE8899 is trying to tell you is that once they start eating ASF it's hard to get them to switch back over once you need to. If it was me I would make every attempt to feed them Rats, whether it be F/T, Live, or whatever. Check and recheck humidity, temps, and substrate. Then if nothing at all will work after a month or so then by all means switch over, but only as a last resort.