How many two-headed animal shakers do you have?  Probably not many.  This unusual piece is stamped "Germany" and each cow head is the shaker with the central body as the mustard pot.  Circa 1910s-20s.

The shaker database also contains a two-headed cat condiment.  The base is stamped "tchecoslovaquie" which is Czechoslovakia - circa pre-WWII.

Two-headed cat condiment salt and pepper shakers from Czechoslovakia
Germany two-headed cow condiment salt and pepper shakers