I've had two attempts at cannibalization during breeding seasons. One required me to rush them under tap water to get the offending snake to release their constriction. The other was the female 'tasting' the male as I watched. They were even locked at the time, which made her 'bite... release... bite... release... bite... attempt.... release' even odder to witness. Fortunately no intervention was required in that case.
My first attempt at cohabbing (multiple hot spots, multiple hides, 55 gallon tank, same size hatchlings) resulted in such stress for the snow that it was at least a YEAR, probably longer, before I could even touch it without it going on a 3 week long hunger strike. At 3 years old, the snow was just over 100 grams. And that was despite being cohabbed for only two months or so.