Oh yeah, they can have weirdly specific preferences. I try not to do prekilled for anything but very small babies, but I have a few that just will not eat roaches, or will only eat roaches if I tong-feed them and literally hold the roach down for them. Some Ts are just not quite smart enough to actually hunt them down if they get away and flatten against something. I hate crickets but I've found pretty much any T will eat them because they're very noisy and clumsy and barge around the tank in a way that I guess is enticing. Once they do some webbing you can also try dropping worms into the actual web so they get stuck and can't burrow, but some Ts will be frightened of how violently mealworms thrash around - it can be annoying figuring out who wants to eat what.
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