Raising large numbers of termites sounds like something that could involve a lot of permits and risk accusations from everyone locally if termites ever happened to show up in their home structures. Hard to prove where they came from, but not sure I'd risk the litigation there. Ants maybe, though I don't know if chickens are particularly fond of ants. Seems like they prefer larger insects most of the time. Then again, they do enjoy larval insects, so maybe if the ants are about that same size it works.
I think any permaculture farm is a termite farm. After all, termites eat dead plant material-- not just in wood, but in leaf litter, soil, and feces. So, a healthy farm has termites. And, a healthy farm has termite predators, like chickens, to keep termites from becoming a termite problem.
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