I had a similar prob with my baby sand Boa a couple of years ago ..
Solved it by putting the snake and the warmed up , thawed pinkie / fuzzy in a tiny little container ( with a lid) and left them for an hour or two in the dark ... I put the container in the sand Boas viv for security in case it forced the lid off .
Worked every time
Sent from my iPhone using Tapatalk Pro