I use a peat and play sand mix. About 2:1. For hides, I use clay pots which are broken (somewhat* stratigicallyhopefully a few of these little guys will be mine soonA few questions:
Are you using sand?
What sould be used as a hide?
Do they climb or stay on the ground?
What temp/humidity are you keeping them at?
They are pretty small. They could probaly eat few day old crickets but I am feeding them fresh killed prey.How small are your V spinigerus slings? Are they able to take take live prey yet? Right now I have 5 I2 L mucronatus that are too small for even pinheads so I give em prekilled small cricks, it's amusing to watch a sling sting a crick that's already dead.
My I4's do that, they piggy back it to their burrow. They are getting stronger though, one took a cricket double it's size out in one punch the other morning, didn't even waste his time on any more attempts.I just crush the heads and drop it in the vial, I ussually check in on them in an hour or so and most of the time they are munching on it, a few times one or two will even be dragging it around.
Alternatively you could breed your own crickets......Yeah, it's hard to find crickets small enouph to feed slings of small species without ordering some, and even if you did they would only be small enouph for a few feedings.