[cute kids]

sometimes a year like this is just a roll of the dice; you might now go ten years and never loose even one. do check out the possibility of a genetic cause; i am glad you are having the necropsy. hopefully it will shed some light on the problem.
let the frolicking of your little buckling help you to remember why you wanted to do this, and try to not make any hasty decisions. i am glad you will be having other kids soon, too.
maybe if the vet could put a kid down if a sure death is imminent, you would know the kid was at peace and not have to see it suffer. still births are so hard, but watching a little one fade is probably worse.
good luck. go hug that little guy

 

[cute kids]

i think toxins from a plant or poison of some kind would effect BOTH twins, not just one....

 

[cute kids]

and the fact that one twin is just fine further backs just bad cards for the other little guy you lost. if this case were environmental in any way, it should have affected BOTH twins. your other loses could have been other things, but this one just happened to come during this bad year with most likely nothing to do with where you live or what color car you drive.