The nature zone gecko bites aren't made for leos. If you are going to have an insectivorous lizard you are going to have to handle bugs to keep it healthy. The freeze dried insects have very little nutritional value too. Maybe not bad as a treat or addition, but I wouldn't feed anything around it. I do have some of those beardie bites, they are good if the beardie will eat them. But again, you can't base the dragons diet around it. Adults need fresh greens, babies need live insects. I put a bit in the salad once in a while, as it does have some good vitamins. The flukers cricket cubes and foods are phenomenal. I have the cricket food, and I feed it to most of my feeder bugs, crickets, supers, mealies. And that site is great, prices are good, (They have the cheapest reptisun bulbs I've seen.) and if you order over $50 there is no shipping. Can't beat that.
Yes, the Jamaican crickets bite. Hard. I am far from an entomologist, so I am scared to try to identify different species. I don't leave any crickets in any enclosure with any reptile I am not supervising. There is actually a potential third species. I used to get all of my crickets from Gahns, but they have switched to the Gryllus assimilis too.
It was a baby gecko if I remember correctly, and yes it was killed, and partially eaten. Crickets will eat almost anything, including feces. Which on a separate subject, is how many people get unhealthy loads of internal parasites and bacteria in their lizards. The crickets stay in the cage feeding on the parasites in the feces, lizard eats cricket, defecates parasites, which is fed on by crickets, immensely speeding up the life cycle of the parasites, mostly coccidia.
And yes, I do know too much about insects. Damn lizards