So I see this wasn't addressed to me, so pardon my rudeness, but so far, I'm thinking the bull symbolizes fate, expiration, death.
Too many people are frightened of the end to them. Without an end, beginnings would last forever and God would only have one life to play with. To me, this is the real reason why there's more than 2 or 3 people on the planet. The more the merrier!
You might want to charge back at the bull, to see which one of you will turn away first.
Hope this helps,