inbred mutants
Oddly enough some evidence from various dog clubs suggests that pure bred dogs are more likely to suffer the effects of brain damage due to cancer etc and "go wild without notice".
I have spoken to owners that have been savanged by dogs due to undetected cancers affecting thier blood checmistry/brains and making them attack people/thing with no warning whatsover. The dogs were put down, died in the attempt to kill the owner or died very shortly afterwards while being rushed to the vets.
So, I think "very very" becomes "happens quite a bit with certain breeds".
Jacqui
Back onto the IT angle - I offered to provide the database facilities (software, hardware and support services) to allow the kennel club to track births and deaths (and causes) information (for free!) but they declined.