I do use kelp meal but thought I'd try some Spirulina too since I am going to start using it too in my smoothies in the morning. I also just started giving it to my dogs. Sounds like a perfect supplement.I've put spirulina in kefir shakes before, but never given it to my flock. It would be a great supplement for them though. Have you used dried kelp in their feed? That's what I use as a supplement for my birds.