It could be a possibility. The inverts don't eat as much. My tarantula ate only two from my most recent batch, the frogs ate the rest.
My tarantula seems fine but it is even harder to see if they are sick than frogs. I will keep an eye on her though. I've never heard of crickets being contaminated but now that I think about it I see how it could happen.
Thanks for everyone's help. I think I just wanted some bit of closure. For some people they may just be frogs but I really cared about them. Them dying wasn't as bad as loosing my 17 yo cat last year but it definitely made my day awful.
I'm thinking no more frogs for me for awhile, rescue or not.