Hey JPadronMiami. Hope all is well with you. Thanks for your response, I hope you have a cooler climate and laying hens now.
It has taken a while for the lab reports to come back, and because I was worried I may have had a Mareks outbreak, the lab did some extra tests, which took some time. The final results came in end of last week.
To cut a very long story short, both Mimi and Squeak had tumors in their livers and Mimi also had tumors in her brain. Mimi had an enlarged heart and she had some different form of tumors in her spleen, but none of the tumors were listed as the cause of death initially. The first lab report stated E.Coli as the cause of death in both hens, which I would agree with, as they both had secondary infections. However, in the second lab report the considered cause of death changed to a possible retrovirus, namely Avian Leukosis. This conclusion does seem to fit with the symptoms in both hens, and unfortunately the remaining six hens seem to now be showing signs of the affect of the virus. I am seeing a drop in laying and also a high number of rubber and misshapen eggs across all hens, when they do eventually lay.
All very sad, and I am at a loss to know what to do next. The flock I believe has to remain closed, as I can’t breed from any of them in case of a vertical spread of the virus from mother to chick.
I haven’t the heart to cull the remaining girls, but neither do I want them to get sick, so I will wait and see what the next months bring.