Received response from vet today regarding the results - "Dr. Garner reports that he did not find any diagnostic lesions in the tissues submitted. There were some very slight changes in the brain matter that he thinks may have been the result of exposure to a toxin some time in the past."
Tyler and I wondered if I have been getting some bad feeders because I had a healthy BP and ATB die a day after feeding approx. 8 months ago... which is kind of in line with when Lemon stopped feeding. However, other snakes that ate from same batches appear to be fine. I can't think of anything Lemondrop could have come in contact with that would be a toxin and nothing that only SHE would have come in contact with.
