Hi I recently bought two hens from an auction. Once getting them home we saw they were completely infested with lice and severely malnourished. We've since wormed them and powdered for lice. Unfortunately one was so sick we had to put her down. The second one seems happy except once you crack open her eggs there is a strange fatty lump and a black dot inside the yolk of the egg. The eggs are definately not fertile and I'm completely at a loss as I've never seen this before and need to know if this may be infectious as we have many other poultry on the property. Any help wld be greatly appreciated.