I haven't been feeding this flock scratch, but I do give them black oil sunflower seeds for added protein. The reason I am suspicious of impacted gizzard is because we have dealt with that last summer and lost several. We cut two open to verify the diagnosis. All the birds are able to eat and drink (and poop, I presume). What I'm worried about is what if the gizzard or intestine is not 100% occluded, like say 95%, whereas just enough food could pass to sustain life, but that's it? That could explain why they haven't died yet. I will probably do a fecal test at the vet's office when I can get a chance, just to rule out worms. I'm just so worried about the gizzard impaction. I might try adding some oil to their feed this weekend. Anything wet will freeze solid (it's been -35 F). Someone on another thread had mentioned that internal egg laying can cause a hen to starve to death. I will have to read about it. I don't think my EE are getting more feed than the Brahmas. I would say the Brahmas are higher in pecking order in this flock.