"Anytime glass shatters or breaks in my vicinity, it directly reflects a piece of my past that has been shattered and let go of. It reflects a breaking open of new opportunities. It reflects a significant, positive change about to enter my life. The Universe, knowing how much I love signs and omens, always sends me timely notices just before a shift. Broken glass means a definitive shift is on its way. "
from a website - think it could have been a cat too.