I usually feed my mantises fruit flies but I've been out for awhile so I went to the pet store to see what feeders they had available. I was told small crickets should work so I got 100. Once I got home I of course found the crickets to be too big so I put them in a jar to use for my spider. Honestly it's been a day, maybe 2 since I checked on them and today I found that they were all dead and there were many plump fruit fly looking buggies in the jar and various forms of their lifecycle. I have no clue what happened to cause all the crickets to die so suddenly and for the flying buggers to show up so fast. Also is it safe to feed these fliers to my mantises? The crickets all look rather gooey if that means anything to anyone