[love our addi]

Romeo and Belle(our new Yorkie) ate about a 1/4 of a chocolate Easter bunny. I would guess about 2 or 3 oz. Romeo weighs 4 pounds and Belle weighs 6 1/2 pounds. The bunny was made from milk chocolate, not dark. Does anyone have any advice? Should I try to reach our vet(I'm not even sure I can today)?
Thanks in advance for any help you guys can give me.