there is a certain amount of overfill included
with any respectable cricket producer
In the expectation that some will die in shipping
(crushing by carrots, heat stress, infection etc)
I would call and notify the provider if I get more than a third dead in the summer.
Generally, you can get a good feel for what the shipment should be like
and when the feeder death has been excessive.
(not to mention the smell)
you can relax ... bad bug producers go out of business very quickly.