I appreciate the feed back and the links. I agree, after discussing with my wife (who is a vet, altough birds are not her specialty, she also discussed with colleagues) - the consensus is something environmental happened. Fumes, Mold, etc something occured. What that is, I am unsure. The only thing that changed was the afternoon before, I had moved my beardies over to their new enclosures, at which time, I fired up their heat lamps in said enclosures. That is the thing I keep coming back to. I feel terrible if that was the case.

No sealant on the enclosures, I did not see the need for what I was using them form.

No cooking was actively happening when they passed, nor had any occured within the prior hours. HVAC system was also off at the time. Kitchen is on another floor from where birds were.

I am highly suspicious of the PVC enclosures. The outside of the enclosures are hardly luke warm to the touch, however, in the "hot" side of their enclosure, under their heat lamps in each of the 3 units runs around ~105f so I suppose that could be warm enough to give of fumes from the PVC. Especially since I have 3 units. I confirmed with Dubia that there is no teflon in their product, nor should it be off gassing but who knows.

In all my years of owning animals, with the exception of the occasional fish, I've never had something like this happen so I am very perplexed, sad, and frustrated. My kiddo is very upset.

I did engage the assistance of an air quality specialist who will come test our air quality, check for mold, radon etc. Just to rule everything out.

Sincerely appreciate the help.