I’m confused about the use of the indefinite article a in the following passage:
My lucky charm is a rabbit’s foot that I received as a gift on my birthday. I don't really know if it has ever brought me good luck, but I always carry it in my pocket.... People have believed that carrying a rabbit’s foot will protect them.
We know that to represent all members of a class or group of people, things, etc. a plural count noun or a singular noun with a definite or an indefinite article may be used. So can I use the rabbit’s foot instead of a rabbit’s foot in the above passage?