Necropsy Results on Little Boo

The preliminary necropsy results came in, 2 pathologists have already reviewed it and agree so far, and sent it onto a specialist in respiratory pathology to get a little more details...

But, in general, its good news for the remaining puppies and Kylee...

All infectious diseases were ruled out - bacterial pneumonia, distemper, CHV, parvo, etc. All cultures so far are negative for everything.

He had a normal structure to his heart (no missing or malformed valves), and all else appeared 'normal' except for his veins...
They were very abnormal - structure (size) and fibrous (too stiff, couldnt contract/open/close/pump), which resulted in congestion in his lungs. This explains the initial diagnosis of pneumonia, and his heart appearance plus the fact of no murmur. His heart was overworked in order to get oxygen (of any quality) into his lungs and body tissues.

This is considered an oddity, an anomaly, with no concern for the litter mates having any problems, as well as Kylee producing a puppy similar to this in the future.

He did have blood in his lungs and evidence of chronically 'oxygen-deprived' tissue.
This was a slow progression from birth with a gradual decline in lung function

The respiratory pathologist still needs to review the case. That person will give us more details - how often it has been seen in past? remarks/comments on genetic influence?