I got mine about three months ago. It had one large head and one baby. Now it has 8 heads. I have spot fed it just a couple of times, but mostly I think it just gets food from the water--I feed phytoplankton three times a week and coral food about once a week.
With all the heads, mine is starting to look ball-like, like some of you mentioned. I thought it was going to branch out like a tree...