possibly a blown out disk. It is probably best to go see a chiropractor. Ask if they practice Gonstead Chiropractic, it is the most accurate way of adjusting.
Slaughter.
"Bolt from the blue" is an idiom that refers to a sudden, unexpected event or piece of news that takes someone by surprise. It describes a sudden and unforeseen occurrence that is shocking or unexpected.
Asphyxiation
There are several causes of sudden water retention. Poor circulation, premenstrual symptoms, salt, or a blockage in the lymphatic system can all cause this condition.
a surge of testosterone in males and it causes ovulation in females.
Ingesting Ipecac
testosterone
Improper diet
A shock is something which causes sudden, heavy impact, a sudden electrical charge, or an amount of considerable emotional impact.
I would ask your vet but that sounds like Parvo
Sudden change in blood pressure.
catastrophe