sounds like an real late 06 ore an ealry 07 corn i have 2 07 anda recent rescue that I am guessing about an 06 they close in siz butthe rescue beign a little bigger in diameter. I giving mine either live or ft pinkie rats ( these guys are just about openngi their eyes .. and theyeat then down with notrouble and i feed like this only 7-10 days since he prey pretty big ( it hard to keep the right size on hand.. ) as for the rescue it has yet to eat . so I gognio t try a ft like the previous owner was feedign cause it act scared ofthe live prey.. the ones i got love ot burrow in the aspen so make sure it at least a good inch deep..