Sorry, I know this is an older thread, but I wanted to mention that I too love grubblies (and any other company that raises black soldier fly larvae on human food waste). I've been buying and using them since they were a very tiny company and still sold the grubs in brown paper bags. I am not sponsored and I'm pretty sure the company doesn't know I exist, but I wanted to mention; for just a few birds / small flocks, especially of pet chickens, these are a great and healthy treat. It might get too expensive for people with lots of chickens. This is a fantastic way to offer a quality protein in a more environmentally friendly way for those that seek to do so. This may be anecdotal, but my birds seem to have much better feathering and molts on this protein (vs animal proteins or mass-produced mealworms). They do have a lot more calcium than mealworms, too. Even if they didn't, the methods behind raising black soldier fly larve jive more strongly with my personal ethics. You may feel otherwise (that's okay!).
I've read some people say that their birds prefer these less than mealworms, but I suspect that's because chickens are often exposed to mealworms as a treat first, when they were young, and it becomes a favorite simply due to exposure to that item; the chicks I raised with dried black soldier fly larvae as treats prefer them vastly over dried mealworms. My other, older hens that I raised with mealworm treats prefer both dried larvae and dried mealworms about equally. It took them a while to "get into" the grubblies, but now they will come running across the yard if they hear the bag being picked up!
This may sound gross, but the grubblies smell good, too. My husband asked what sort of (people) snack I had there that I was "sharing with the chickens" because it smelled good to him (haha!).
