I don't care much for horses — and most of the information regarding Epona has to do with her role as a Goddess of horses. Because most sources cite her symbol as the cornucopia, there is some thought that she also a fertility Goddess and I'm not at that stage of my life either.
By digging a little deeper, I found that Epona was also a protector of animals. Since I received a puppy earlier this week, I have a new-found need to learn about Epona and how She can help protect my pup (http://findagoddess.com).
Another source suggests that Epona will help people reach their dreams (http://www.goddess.com.au). According to this site, she rides her white mare to bring the dreams to you and will manifest the dream if you accept her assistance.
Goddess Epona, I ask that you watch over this pup. Protect him from harm. Keep him from wandering and allow me to create the home he will not want to leave. This is my wish, so mote it be.