Is my mom a Horse or a Sheep?

My mom was born in either 1954 or 1955. I don't know which is which so I am asking this question.

Some facts:

1. She married an earth rat (1948) and still have a pretty stable marriage.
2. She's intelligent, got honors in high school, graduated from the premier university in the country.
3. She's smart, practical, attractive, eloquent, a good leader, caring, thoughtful, decorative, young-looking, knows how to balance all things (she has 3 children and we can't figure out who's the real favorite!), wise, knows how to project herself very well, elegant.
4. I was born in the year of the fire rabbit and i am very close to her. i am a mama's boy...
5. her birthday is May 3 (so she's also a Dragon).