Over the last year or so we have had 7 birds die suddenly. By suddenly, I mean that they were totally fine, then got sleepy acting for a couple of days, then they were dead. They have no symptoms other than being extremely emaciated at death. It's like they just decide to stop eating and within a week are dead. We just lost another one this afternoon. A week ago I had picked her up and she was fat and healthy. Today when we found her she was bones. I had a fecal test done on the flock last year and the only parasite found was a small amount of capillaria and the vet just said to start mixing Diatomaceous Earth with their feed to control it, which we have been. The very first one that died, we took to the lab to figure out why. They found tapeworms in that bird, but it was not a lot. That bird also had what they said may be lymphoid leukosis, but couldn't say for sure. The lab report also said that the lining of that bird's crop had an odd, crumbly texture. What might be making these birds just decide to stop eating and die within such a short period of time? They have all been over a year old and some over 2-3 years. Any ideas will be greatly appreciated. Thanks!