if hes gonna do a feeding demo 4 you and your thermostat isnt in on time just go ahead and have him show you the snake eating...if u get the thermostat in time i would go there acting like you still want the guy to feed him and when you get there you can just tell him to skip it and take him home than if u want

if hes willing to do it thinking you still want him to hes probably not lying to yah