Holy cow the first two are insane! I have no idea what is going on with them! Were the parents related? Possibly carrying something genetic?
If there was a spike, it could definitely contribute to the crazy patterns. I didn't read far enough to see there was a temp issue. I have seen some really crazy looking patterns just because the temps spiked. It's so strange that the temp can have that much of an effect on patterns, but it does happen.