Transitioning Feeding from live to F/T

[Alexandra V]

S/he is about 18 inches and her thickest part is at least an inch around.. s/he just kinda landed in our laps and so I am assuming s/he is a rather young one

If she's 18 inches long and only about an inch around she sounds underweight to me, correct me if I'm wrong. If I were in your shoes I would maybe continue on live with her for a little while, and maybe put her on hopper mice or the rat equivalent of that size (fuzzy? I'm not sure) until she gets a bit bigger and then attempt the switch.