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remarkikkin, you can do both. The BSF grubs pass through 5 stages as larvae, and the final stage is a very dark brown color. If you wait to feed them to your chickens until they reach this stage then they will have eaten all that they will ever eat in their lifetime.
It has also been suggested that when the larvae make that final transformation that they secrete an antibiotic in preparation for pupation. If that's true then there may be benefits that are passed on to animals that eat the mature grubs.
remarkikkin, you can do both. The BSF grubs pass through 5 stages as larvae, and the final stage is a very dark brown color. If you wait to feed them to your chickens until they reach this stage then they will have eaten all that they will ever eat in their lifetime.
It has also been suggested that when the larvae make that final transformation that they secrete an antibiotic in preparation for pupation. If that's true then there may be benefits that are passed on to animals that eat the mature grubs.