Were they eating crickets from this batch for awhile without being sick/ or was today the first time they had them?
Anything sprayed near the crickets, or used in there container? Were they fed anything different? I'm talking about what the crickets may have eaten, any fruit or veggies that may not have been washed /sprayed with something at the store???
Sounds to me like the crickets had something on them, or in them that was slightly toxic and affected them, like we would have an allergic reaction, and not breath well. Also are the crickets damp at all, if their container gets damp they can get a fungal diease that will make lizards sick. Crickets have to be kept extremely dry.
They are the only things I can think off off the top of my head Cecil. I sure hope the kids will be okay. I don't think I would use those crickets.
-----
PHEve / Eve