My 1/4" brachy didn't always take live pinheads and often preferred prekilled. If the pinhead was the same size as the T or bigger I would prekill it if it was small enough then I would put it in live for one night and if it didn't, I would take it then I would squish it's head(so it's still twitchy) the following night and leave it overnight.Can pinhead crickets cause harm to my 1/3" slings?