I'm not an expert on these particular frogs, but it looks like you're doing things right. Hopefully being captive bred will make all the difference and they'll be sturdier and less stressed. I can understand your anxiety though. Young frogs look so tiny and delicate. I'd give it a few more days to see whether the reluctant frog starts hunting.

As far as vendors that don't spray, sometimes you can pick up common houseplants at farmer's markets, or take cuttings from friend's houseplants. Not sure how that would work with orchids though, sorry.