Did anyone give you any input of how they died? I mean were they all just found dead in the cage or any thoughts as to resp issues?
In my group I have two different things going on with two sets of brothers:
Group #1
Fizzgig, Lightning, Spice, Dusty - Dusty is the only survivor at 28 months old
Fizzgig had a heart attack that threw clots everywhere (necropsy)
Lightning had various blood clots - definite on the spinal as the vet "felt" it and both vets agreed and highly likely on lung clots
Spice - lung lesions possibly clots, not varified by necropsy but unresponsive to any ab's only responded to pred
Dusty - didn't get the bad clot genetics (??) still living, ear issues though and masses
Group #2 - These boys were living outside for a while, in April, and its cold outside. As far as my vet is concerned, all of them have some type of lung scarring from the conditions they were in but Lou was not necropsied as a definitive and Ollie was not in my possession when he passed.
7 boys - dad and sons
Ollie - dad - found dead in cage
Lou - resp issues died from complications (pts)
Stanley - resp issues
Larry - lung scarring, highly chronic resp issues
Moe - still living, to my knowledge, not sure of problems
Bud - ok, no known resp probs
Curly - ok, no known resp probs
My point with my rambling is that, as you well know, it could be genetic or environmental. Sounds like at this point Nessie is still doing well and maybe it was genetics?? And she got the good genes!!