My guess is it would have more to do with them not having any recovery period afterwards than the heat spike itself.

What I mean is, in nature, they may have several hours a day where the temps may hit low triple digits but the inverse is they may have temps as low as 40's or 50's at night.

However, when we use incubators and get an extended heat spike the lowest temp it's going to go down to is mid/high 70's, giving the embryo no real recovery time.

This is why I think those of us who don't incubate don't come across heat related kinking in our neonates.

Also, most quadrupeds use their spinal columns as a primary/secondary/tertiary form of heat dispersal, so there's anecdotal evidence to support this claim.
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westmextricolors.wix.com/west1

i work with tri-colored west mexican lampropeltis. some morph, some hobby, and some locale.

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