Along with limited handling, and all the other members advice.. I was just dealing with the same issues a lil while ago… as we over look sometimes very small details that can be an easy fix... look over the communication with the breeder or reach out them to see what he was eating,
May be you did already, or someone hit on the actual cause, but being fresh out of a 3 month strike with my noodle, I have him going steady now.
I thought I read F/T but it was live hoppers.. so yes Lam ate the F/T the 1st time (about 2weeks after I got him I tried the F/T again next feed, but the next 2 attempts I wasted the mice mice.. so i went back and was on hoppers. Knowing my Lam is a striker – he is still very aggressive, I know he’ll strike at the hoppers, and eventually feed. So he is on his rat hoppers rn, or adult mice if they do not have hoppers/.. but don’t get too comfortable until with the switch until its continuous, like I said 3 months of trying to wait him out to keep him on his 1st F/T but I can wait long as he’s eating ..
as everyone has already said, get him on a consistent meal he will accept and allow him to pick up some weight at least a few months and then try.. He may not be so picky once he’s on a routine schedule.. then you hit him with: the starve an extra week or so, then you offer.. “oh I’m so hungry … (IDC) .. snatch!!! And then you have your F/T switch (BAMM!)