Ivy,
As I do not have the luxury of watching my Ovs for such a long time, it always seems to me very quick. Justin did make a better time frame, but to me it always seemed too quick, and I have missed them on more than one occasion. (Granted I never timed them... It was a guess)
They don't stay big, so what you saw was probably ovulationThey stay changed color for longer, but not big.
And as for normal, if you are breeding, yeah, it is!![]()