Looks to me like a very rare hybrid known as "
Gallus gallus piranha ferox", last seen in the Amazonian forest in 1871 and until recently considered extinct. Most closely related to the Rhode Island Red we are all familiar with, in fact the RIRs are considered direct descendants, having been imported to North America from Guatemala in the 1860s.
Some well-known avian zoologists have speculated that this bird is an example of a "reverse mutation", commonly known as a "throwback", to the Jurassic era when the teeth were used as a form of defense as well as a form of predation, generally of small lizards frequenting the
Amazon basin.
However, the teeth fall out at about the age of two years in most of this breed, leading to our colloquialism still in use today: "scarce as hen's teeth".
Petrified chicken teeth have been located in archaeological digs in the Amazonian rainforest, and occasionally in streams and riverbeds. Indigenous tribal members often collected these same teeth, highly prized due to their rarity, and would craft jewelry and other ornamentation used in spiritual tribal rituals and traditionally donning the ornaments during hunting parties as well.
Others here may have additional information.