This sounds like it could be lymph nodes and should be checked by a doctor.
Slaughter.
Getting kicked in the balls will give you those symptoms every time. Ask me, I know these things.
Asphyxiation
Sugar causes cavities and gets them on a sugar rush, which causes sugar crashes, like getting fatigued, because they had so much energy in their bodies, and all of the sudden they lost it. That and they might have health issues
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
catastrophe